Evolution of the Construction Industry in China from the Perspectives of the Driving and Driven Ability

: The construction industry has been developing in recent years, facilitating economic development in China. However, the industry’s development has been confronted by a series of challenges. Exploring the characteristics of the inﬂuences of power and the association structure and their level of correlation in the construction industry is important to improve the understanding of the status and development of laws, to optimize industrial structure, and to improve the efﬁciency of the construction industry—factors that are fundamental to the realization of an optimized, upgraded construction industry. Therefore, the total consumption coefﬁcient and the total distribution coefﬁcient were calculated to reveal the inﬂuencing power of the construction industry. Based on the total consumption coefﬁcient and the total distribution coefﬁcient, the driven coefﬁcient and driving coefﬁcient are used to reﬂect the general effect on the entire industry network. The driven and driving networks were constructed using the total consumption coefﬁcient and the total distribution coefﬁcient to reveal the critical positions of the networks. The results show that the construction industry has signiﬁcant driven and driving effects on other industries, which facilitate the improvement of the entire economic industry. However, an obvious gap exists between the driven ability and the driving ability as measured by the complex network. The point degree, betweenness degree, and subgroup cohesive characteristics show that the effect of the driven ability is much greater than that of the driving ability for the construction industry in 30 provinces. The ﬁndings provide information for policymaking related to the sustainable development of the construction industry in China.


Introduction
The construction industry has contributed considerably to China's economic development and the urbanization process. The gross output of the construction industry in China has increased from USD $0.21765 trillion to USD $2.902 trillion dollars, up by 1160% (China Statistical Yearbooks). However, the construction industry is still a traditional industry in China, characterized by low efficiency, high pollution, large capital requirements, and an unreasonable structure, hindering its development [1]. With the further deepening of the globalization of China's economy, the optimization and upgrading of industrial structure will be the major problems to be addressed [2][3][4] by China's construction industry in the future.
The construction industry plays an important role in the national economy, having quickly progressed and developed [5][6][7][8]. However, some fundamental changes occurred in the construction industry after the economic reform [7]. The relationship between the construction industry and the economy has been studied, and the results reported are inconsistent [9]. In 1978, the data from 87 countries were analyzed, showing that with the increase in per capita gross domestic product (GDP), As shown in Figure 1, the framework of the methodology used in this paper mainly includes three steps: (1) The definition of the characteristics of construction industry from the driven and driving perspective. In this paper, the driven and driving characteristics are discussed from two aspects: The characteristics of construction industry relative to other industries and in the entire industrial system. (2) The reflection of the driven and driving characteristics of construction industry. First, the driven and driving coefficients are established according to the total consumption and total distribution coefficient. Second, based on the driven and driving coefficients, the driven social network and driving social network are constructed. (3) The analysis of driven and driving characteristics from two aspects: Relative to other industries and in the entire industrial system. The driven and driving coefficient are used to represent the driven and driving power to other industries. After that, the social network analysis method is used to reveal the characteristics of construction industry relative to the entire industrial system.

Driving Coefficient and Driven Coefficient
The total consumption/distribution coefficient is the amount of production/products of the ith industry consumed/distributed to/by the unit products/production of the industries that have direct and indirect relationships with the ith industry. The total consumption coefficient reflects the industry's backward linkage, which is called the driven ability in this paper. The total distribution coefficient reflects the industry's forward linkage, which is called the driving ability. The total consumption/distribution coefficient of the ith industry is used to explain the driven/driving ability of the ith industry to the specified industry. However, the coefficient cannot reveal the driven/driving ability of the ith industry for the entire industrial system. Therefore, this paper proposes the use of the driven/driving coefficients to measure the industry's driven/driving ability for the entire industrial system. The driven coefficient represents the sum of all other industries' products consumed by the unit production of the ith industry. Similarly, the driving coefficient represents the sum value of all other industries' products resulting from the ith industry's unit production.

Total Consumption Coefficient and Driven Coefficient
The driven coefficient is calculated based on the total consumption coefficient. The total consumption coefficient represents the direct and indirect consumption by the unit output of the producer [1]. It reveals the direct and indirect relationships between industries [34]: where B is the total consumption coefficient, A is the direct consumption coefficient, and C is the indirect consumption coefficient. The total consumption coefficient is the sum of A and C [2]:

Driving Coefficient and Driven Coefficient
The total consumption/distribution coefficient is the amount of production/products of the ith industry consumed/distributed to/by the unit products/production of the industries that have direct and indirect relationships with the ith industry. The total consumption coefficient reflects the industry's backward linkage, which is called the driven ability in this paper. The total distribution coefficient reflects the industry's forward linkage, which is called the driving ability. The total consumption/distribution coefficient of the ith industry is used to explain the driven/driving ability of the ith industry to the specified industry. However, the coefficient cannot reveal the driven/driving ability of the ith industry for the entire industrial system. Therefore, this paper proposes the use of the driven/driving coefficients to measure the industry's driven/driving ability for the entire industrial system. The driven coefficient represents the sum of all other industries' products consumed by the unit production of the ith industry. Similarly, the driving coefficient represents the sum value of all other industries' products resulting from the ith industry's unit production.

Total Consumption Coefficient and Driven Coefficient
The driven coefficient is calculated based on the total consumption coefficient. The total consumption coefficient represents the direct and indirect consumption by the unit output of the producer [1]. It reveals the direct and indirect relationships between industries [34]: where B is the total consumption coefficient, A is the direct consumption coefficient, and C is the indirect consumption coefficient. The total consumption coefficient is the sum of A and C [2]: where a ij is the amount of the ith industry's products consumed by the jth sector's unit production. B can be obtained as follows: where I is the same order unit matrix. The driven coefficient F j can be expressed by Equation (5). The driven coefficient measures the driven ability of the industry on other industries: where b ij is the total consumption coefficient. The larger the driven coefficient, the greater the driven ability of the industry. F j may be greater than 1, indicating that the driven ability of jth industry exceeds the average level of the driven ability of all industries.

Total Distribution Coefficient and Driving Coefficient
The driving coefficient is calculated based on the total distribution coefficient. The structure is symmetric between the total distribution coefficient and the total consumption coefficient. Therefore, the calculation method for the total distribution coefficient is similar to that of the total consumption coefficient, with the calculation of columns transformed into the calculation of rows: where R is the matrix of direct distribution coefficient and r ij is the direct distribution coefficient, representing the amount of the ith industry's unit products that is distributed to the jth industry's production. The distribution coefficient can be expressed as follows: where D is the total distribution coefficient matrix. The driving coefficient F i can be demonstrated as follows: where d ij is the total distribution coefficient. The driving coefficient measures the industry's driving ability on other industries. The larger the driving coefficient is the greater driving ability of the ith industry. F i may be greater than 1, indicating that the driving ability of the ith industry exceeds the average level of the driving ability of all industries.

Construct of Complex Network
A complex network of industries in China was constructed using 0-1 matrices that were dichotomized from the total distribution coefficient and total consumption coefficient matrix. The thresholds of the 0-1 matrices used in this paper were the averages of the total distribution coefficient and total consumption coefficient matrix. The value of the total distribution coefficient and total consumption coefficient matrix was 1 when it was greater than the average, indicating an obvious relationship between industries. The value was 0 when it was smaller than the average, indicating no obvious relationship between industries [3].

Density Analysis of the Complex Network
The density of industrial complex network can be used to describe the degree of tightness between nodes in an industrial network. The relationship between nodes is tighter when the network density is close to 1, representing higher speed and efficiency of information and material flow in the network. The complex network density can be denoted by D, as follows: where T is the number of edges connecting all nodes and n is the number of all nodes in the network. In this paper, n = 123.

Centrality Analysis of the Complex Network
Centrality reflects the importance of industries in the complex network, consisting of the degree centrality and betweenness centrality. Centrality reflects the industrial influence from a quantitative point of view. The degree centrality focuses on directly measuring the number of edges connected to other nodes and consists of out-degree centrality and in-degree centrality. The out-degree centrality of one node is the number of edges extending from the node, and the in-degree centrality is the number of edges entering the node. They represent the producer and consumer in a complex industrial network, respectively. The betweenness centrality is used to measure the node's control between its two adjacent nodes, representing the key-nexus in the industrial complex network. In this paper, the degree centrality and betweenness degree are used to demonstrate the industries' characteristics in complex network. The degree centrality and betweenness centrality are shown in Figure 2. The density of industrial complex network can be used to describe the degree of tightness between nodes in an industrial network. The relationship between nodes is tighter when the network density is close to 1, representing higher speed and efficiency of information and material flow in the network. The complex network density can be denoted by D, as follows: where T is the number of edges connecting all nodes and n is the number of all nodes in the network. In this paper, n = 123.

Centrality Analysis of the Complex Network
Centrality reflects the importance of industries in the complex network, consisting of the degree centrality and betweenness centrality. Centrality reflects the industrial influence from a quantitative point of view. The degree centrality focuses on directly measuring the number of edges connected to other nodes and consists of out-degree centrality and in-degree centrality. The out-degree centrality of one node is the number of edges extending from the node, and the in-degree centrality is the number of edges entering the node. They represent the producer and consumer in a complex industrial network, respectively. The betweenness centrality is used to measure the node's control between its two adjacent nodes, representing the key-nexus in the industrial complex network. In this paper, the degree centrality and betweenness degree are used to demonstrate the industries' characteristics in complex network. The degree centrality and betweenness centrality are shown in Figure 2.

Cohesive Subgroup Analysis of Complex Network
Cohesive subgroup analysis is a method of exploring the actual or potential relationships between social actors in a complex network. A cohesive subgroup is a subset of the whole set of actors. The actors in the subset have a relatively strong, direct, close, regular, or positive relationship with each other. The relationships between subsets are looser than those within a subset. Through cohesive subgroup analysis, we can measure the structure of communities formed in a complex network and the equilibrium of the entire network.

Data Sources
In this study, the multi-region input-output table (multi-IO tables) from the China Emissions Accounts and Datasets (CEAD) in 2012 was used to calculate the total consumption coefficient and total distribution coefficient of China's economic sectors [35]. The CEDA database provides the most up-to-date input-output tables of energy, emissions, and socioeconomic accounting inventories for China. The multi-IO tables have detailed sectoral divisions that contain 30 separate economic sectors in 30 provinces and municipalities. The 2012 version of the multi-IO tables is the latest version. The relevant departments and their codes are shown in the CEAD datasets and Appendix A [35].

Results
Out-degree centrality In-degree centrality Betweenness centrality

Cohesive Subgroup Analysis of Complex Network
Cohesive subgroup analysis is a method of exploring the actual or potential relationships between social actors in a complex network. A cohesive subgroup is a subset of the whole set of actors. The actors in the subset have a relatively strong, direct, close, regular, or positive relationship with each other. The relationships between subsets are looser than those within a subset. Through cohesive subgroup analysis, we can measure the structure of communities formed in a complex network and the equilibrium of the entire network.

Data Sources
In this study, the multi-region input-output table (multi-IO tables) from the China Emissions Accounts and Datasets (CEAD) in 2012 was used to calculate the total consumption coefficient and total distribution coefficient of China's economic sectors [35]. The CEDA database provides the most up-to-date input-output tables of energy, emissions, and socioeconomic accounting inventories for China. The multi-IO tables have detailed sectoral divisions that contain 30 separate economic sectors in 30 provinces and municipalities. The 2012 version of the multi-IO tables is the latest version. The relevant departments and their codes are shown in the CEAD datasets and Appendix A [35].

Results
Through the network structure, China's construction industry has extensive ties with other industries. The position and the degree of connection of the construction industry with other industries in the industrial structure network are different in different provinces. From the perspective of the driving and driven coefficients and the complex network, I analyzed the influencing power of the construction industry on other industries, as well as the industrial topological structure of China's construction industry in 2012, to determine the evolution of China's construction industry.
The total consumption coefficient in Table 1 provides a good understanding of the detailed information about the providers and their supply capacity for the products and services consumed by the construction industry in 30 provinces and municipalities. Although the total consumption coefficient can reflect the driven effect of the construction industry on another specific industry, it cannot express the driven effect on other industries in general. Therefore, the driven coefficient was employed, which was calculated in Section 2.2.1. The driven coefficients of the construction industry in 30 provinces are shown in Figure 3. Shandong, Henan, Hubei, Guangdong, Guangxi, Sichuan Guizhou, Gansu, and Qinghai are all from the provinces themselves. In other words, these provinces have the ability to supply their own fundamental products and services. The metallurgy products consumed by the construction industry in Shanxi are not only from Shanxi but also from Hebei. Similarly, the province of Jiangsu obtains metallurgy products from the province of Liaoning. Wholesale and retailing services from Jiangsu are significant for the construction industry in Anhui. Henan is the provider of nonmetal products for Hunan. The construction industry in Hainan requires a considerable number of products and services from the provinces of Guangdong, Guangxi, Hainan, and Yunnan. The total consumption coefficient in Table 1 provides a good understanding of the detailed information about the providers and their supply capacity for the products and services consumed by the construction industry in 30 provinces and municipalities. Although the total consumption coefficient can reflect the driven effect of the construction industry on another specific industry, it cannot express the driven effect on other industries in general. Therefore, the driven coefficient was employed, which was calculated in Section 2.2.1. The driven coefficients of the construction industry in 30 provinces are shown in Figure 3.

Total Distribution Coefficient and Driving Coefficient
The total distribution coefficient represents the products and services that are directly and indirectly assigned to different industries. This paper only lists the top 10 industries' codes, and the results are shown in Table 2. Table 2. The top 10 industrial sectors ranked by the total distribution coefficient of the construction industry.

Total Distribution Coefficient and Driving Coefficient
The total distribution coefficient represents the products and services that are directly and indirectly assigned to different industries. This paper only lists the top 10 industries' codes, and the results are shown in Table 2. Table 2. The top 10 industrial sectors ranked by the total distribution coefficient of the construction industry.
To reflect the driving ability of the construction industry in 30 provinces, I employed the driving coefficient calculated in Section 2.2.2. The driving coefficients of the construction industry in 30 provinces are shown in Figure 4.
As shown in Figure 4, the industry with the maximum driving coefficient is Jiangsu, with a driving coefficient is 0.007812513. Next are the provinces of Yunnan and Chongqing, where the driving coefficients are 0.005748049 and 0.005477132, respectively. Xinjiang and Liaoning are the provinces in which the construction industry has a significant influence on the driving ability to stimulate production activities. Shanxi, Shandong, Gansu, Hunan, and Guangxi are provinces that are highly dependent on the driving ability of the construction industry, and they have driving coefficients of 0.004766199, 0.004640367, 0.004567559, 0.004531502, and 0.004530184, respectively. The driving coefficients of Hubei, Hainan, Jiangxi, and Ningxia are also greater than 0.004. Other provinces-13 out of 30 provinces-have relative lower driving coefficients of less than 0.004.
Chongqing, Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang, 27 of 30 provinces, introduce their products to within the province. The products of the construction industry in Beijing are supplied to the nonmetal product industries of Inner Mongolia and Hebei. Similarly, the construction products consumed by the nonmetal mining industry in Jiangsu are from Anhui. The construction industry in Hainan is the main provider of products for the instrument and chemical meter industries in Guangdong.
To reflect the driving ability of the construction industry in 30 provinces, I employed the driving coefficient calculated in Section 2.2.2. The driving coefficients of the construction industry in 30 provinces are shown in Figure 4. As shown in Figure 4, the industry with the maximum driving coefficient is Jiangsu, with a driving coefficient is 0.007812513. Next are the provinces of Yunnan and Chongqing, where the driving coefficients are 0.005748049 and 0.005477132, respectively. Xinjiang and Liaoning are the provinces in which the construction industry has a significant influence on the driving ability to stimulate production activities. Shanxi, Shandong, Gansu, Hunan, and Guangxi are provinces that

Complex Network Analysis
The total consumption matrices and total distribution matrices were dichotomized by the thresholds of the driving network and the driven network. The thresholds are shown in Table 3. Ucinet 6.0 software was used to construct the complex networks of China's 900 industries according to the 0-1 matrices. From the results, the industrial structure between the 900 industries in China in 2012 is considered a typical small world network due to the smaller average path length and higher clustering. The average path length of each year is 1.6, indicating that each industry node only needs to pass 1.6 edges on average to reach another industrial node. As the total number of nodes is 900, the average path length is short. The clustering coefficients of industrial networks range within 0.5 of the average in each year, indicating that the actual number of edges between industries accounts for 50% of the edges possibly connected. Therefore, the industrial complex network can be measured.

Density Results
The densities of the driving complex network and driven complex network in 2012 are shown in Table 4. The densities of the complex driving and driven networks reflect the level of closeness of the relationships between industries. The higher the density, the closer the relationships between industries. The densities of the driving and driven complex networks of the 900 industries are 0.1155 and 0.0018, respectively. The density of the complex network is relative sparse. The efficiency of resources and information circulation in the complex network of industries has potential for improvement.

Degree of Point Centrality Results
The degree of point centrality includes the point-out degree and point-in degree, which respectively represent the number of the sides entering and exiting the construction industry in the complex network. Point-out and point-in centrality represent the industrial sector that has a direct relationship with the construction industry. The degree of point centralities of 900 industries in 2012 were calculated using Ucinet 6.0 software. This paper only lists the top 10 industries ranked by the degree of point centrality due to the length limitation. These industries are located in critical positions in the complex network and significantly influence the other industries. The top 10 industries ranked by point-out and point-in centrality are shown in Table 5.  Table 5 is the result of the degree of point-out and point-in centrality of the construction industry. The degree of point-out centrality is far less than the degree of point-in centrality in both the complex driving and driven networks.
The maximum degrees of point-out centrality of the construction industry, both in the driving and driven networks, occur in the provinces of Hubei, Shanxi, and Shandong. The degree of point-out centrality reaches 0.596 and 0.181 in the driven and driving networks, respectively, which are far higher than in other provinces. The lowest degrees of point-in centrality of the construction industry in both the driving and the driven networks were found in the provinces of Guangxi, Hebei, and Inner Mongolia. The degree of point-out centrality of the construction industry in Inner Mongolia is only 0.021 and 0.009 in the driven and driving networks, respectively. Notably, the degree of point-out centrality in the provinces of Hubei, Shanxi, Shandong, Beijing, Guizhou, Liaoning, Xinjiang, Jiangsu, Sichuan, Henan, Fujian, Jiangxi, Heilongjiang, Shanghai, and Jilin (15 of 30 provinces), is more than 0.1. In other words, the degree of point-out centrality in half of the 30 provinces is less than 0.1 and in others, it is more than 0.1.
The degree of point-in centrality in both the driven and driving networks is shown in Table 5.

Betweenness Centrality Results
The results of the betweenness degree of the construction industry in 30 provinces were calculated using Ucinet 6.0 software. Table 6 lists the betweenness degree of 30 provinces in 2012. As shown in Table 6, in the driven network, the first group of provinces, including Chongqing, Shaanxi, Gansu, Ningxia, Xinjiang, Qinghai, and Hainan, was ranked by the betweenness degree of the construction industry, where the betweenness degree exceeds 20. In Chongqing, Shaanxi, Gansu, Ningxia, and Xinjiang, the betweenness degrees are 26.66. The betweenness degree was 9.903 in the second class, which includes Beijing, Heilongjiang, Sichuan, and Yunnan. The provinces of Tianjin, Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Henan, Hunan, Guangdong, Guangxi, and Guizhou are in the third class with the same betweenness degree of 5.306. Jiangxi, Shandong, and Hubei are in the last class with the lowest betweenness degree of less than 3.0. In the driving network, the provinces can be divided into four classes according to the betweenness degree. The first class includes the provinces of Ningxia and Qinghai, in which the betweenness degree is around 2.0. Guizhou, Beijing, and Shanxi are in the second class, with betweenness degrees ranging from 1.6 to 1.8. The provinces of Xinjiang, Hubei, Henan, Hainan, Jiangsu, Shanghai, Fujian, Gansu, and Heilongjiang are in the third class, where the betweenness degree is more than 1.0. The other provinces are included in the last class with a betweenness degree of less than 1.0. The betweenness degree of Guangxi was the lowest of all the provinces.

Cohesive Subgroup Results
A cohesive subgroup analysis was conducted for the 30 industries in the 30 provinces based on the complex network, and eight subgroups were obtained. The dendrogram of subgroups is shown in Figure 5. The densities of the subgroups of the driven and driving networks in 2012 are listed in Tables 7 and 8, respectively, showing that the relationships between industries are closer in higher-density subgroups.
The subgroups and their densities are not stable among different subgroups. The densities of the subgroups with higher degree centralities and betweenness centralities are higher than those of the other subgroups. The results of Table 7 show that the densities of the fourth subgroup in 2012 were higher than those of other subgroups. The fourth subgroup therefore had a closer relationship with other subgroups in China's driving network in 2012. However, the results of Table 8 indicate that the first subgroup, the third subgroup, and the fourth subgroup had closer relationships with other subgroups.    The subgroups and their densities are not stable among different subgroups. The densities of the subgroups with higher degree centralities and betweenness centralities are higher than those of the other subgroups. The results of Table 7 show that the densities of the fourth subgroup in 2012 were higher than those of other subgroups. The fourth subgroup therefore had a closer relationship with other subgroups in China's driving network in 2012. However, the results of Table 8 indicate that the first subgroup, the third subgroup, and the fourth subgroup had closer relationships with other subgroups. Figure 4 shows that the construction industry and crop cultivation, public administration, educational services, sporting toys, athletic, medical, and pharmaceutical products, health services, and other industrial sectors are classified into the same subgroup. However, in different years, an industry sector of a given sub group changes with the construction industry, which indicates that the industrial symbiosis relationship between China's construction industry and other industries is not stable. By comparing the density coefficients of the subgroups, the density coefficient between the first subgroup, the second subgroup, the third subgroup, and the other subgroups is larger. In addition to the construction industry in the third subgroup, the rest of the years are in the first    Figure 4 shows that the construction industry and crop cultivation, public administration, educational services, sporting toys, athletic, medical, and pharmaceutical products, health services, and other industrial sectors are classified into the same subgroup. However, in different years, an industry sector of a given sub group changes with the construction industry, which indicates that the industrial symbiosis relationship between China's construction industry and other industries is not stable. By comparing the density coefficients of the subgroups, the density coefficient between the first subgroup, the second subgroup, the third subgroup, and the other subgroups is larger. In addition to the construction industry in the third subgroup, the rest of the years are in the first subgroup, showing that China's construction industry and other industries have relatively strong links.

Spatial Analysis of Total Consumption Coefficient and Total Distribution Coefficient
From the results of the total consumption coefficient and total distribution coefficient, the top 10 industries ranked by the total consumption coefficient include the industries from both the native provinces and non-native provinces. However, from the perspective of the total distribution coefficient, the top 10 industries ranked by the total distribution coefficient are all from native provinces. In other words, the main materials and services needed by the construction industry are from native provinces and non-native provinces. The non-native provinces and the provinces in which the construction industry is located in are relatively close to each other. As for the total distribution, the industries in the native provinces are the main consumers of the products of the construction industry. This reveals the significant immobility of the construction industry products. The products are almost fixed on the ground, forming fixed assets.

Difference in Degree of Point-In Centrality between the Driven and Driving Networks
The degree of point-out centrality and the degree of point-in centrality in the driving and driven networks are shown in Figures 6 and 7, respectively.

Spatial Analysis of Total Consumption Coefficient and Total Distribution Coefficient
From the results of the total consumption coefficient and total distribution coefficient, the top 10 industries ranked by the total consumption coefficient include the industries from both the native provinces and non-native provinces. However, from the perspective of the total distribution coefficient, the top 10 industries ranked by the total distribution coefficient are all from native provinces. In other words, the main materials and services needed by the construction industry are from native provinces and non-native provinces. The non-native provinces and the provinces in which the construction industry is located in are relatively close to each other. As for the total distribution, the industries in the native provinces are the main consumers of the products of the construction industry. This reveals the significant immobility of the construction industry products. The products are almost fixed on the ground, forming fixed assets.

Difference in Degree of Point-In Centrality between the Driven and Driving Networks
The degree of point-out centrality and the degree of point-in centrality in the driving and driven networks are shown in Figures 6 and 7, respectively.    Figures 6 and 7 show that there is a significant gap between the degree of point centrality in the driven network and the driving network. Both the degree of point-in centrality and point-out centrality in the driving network are less than in the driven network. The driving ability for other industries is far less than the driven ability. In other words, the construction industry is the most important consumer in the ecological network of all 30 industries.

Difference in the Betweenness Degree between the Driven Network and the Driving Network
The betweenness degree of the construction industry in the driven network and driving network is shown in Figure 8. industries is far less than the driven ability. In other words, the construction industry is the most important consumer in the ecological network of all 30 industries.

Difference in the Betweenness Degree between the Driven Network and the Driving Network
The betweenness degree of the construction industry in the driven network and driving network is shown in Figure 8. The betweenness degree of the construction industry in the driven network far exceeds that in the driving network. This means that the construction industry is the critical-nexus industry in the driven network but not in the driving network. The construction industry significantly influences the entire driven network as the bridge that facilitates the circulation of resources and information. The trend in betweenness in the driven network, as shown in Figure 8, indicates that the construction industries in 30 provinces can be divided into four subgroups. In 16 provinces out of 30, the betweenness degree of more than half of all the provinces is 5.306. In contrast, the betweenness degree of the construction industry in the driving network fluctuates dramatically.

Forward Association and Backward Association of the Construction Industry
The forward association of the construction industry means that the construction industry's products are consumed by other industries, which significantly influence other industries. The total consumption coefficient can be used to measure the forward association of the construction industry on other industries. Similarly, the backward association of the construction industry means that the demand for materials and services from other industries for the production activities of the construction industry results in its influence on other industries. The total distribution coefficient can The betweenness degree of the construction industry in the driven network far exceeds that in the driving network. This means that the construction industry is the critical-nexus industry in the driven network but not in the driving network. The construction industry significantly influences the entire driven network as the bridge that facilitates the circulation of resources and information. The trend in betweenness in the driven network, as shown in Figure 8, indicates that the construction industries in 30 provinces can be divided into four subgroups. In 16 provinces out of 30, the betweenness degree of more than half of all the provinces is 5.306. In contrast, the betweenness degree of the construction industry in the driving network fluctuates dramatically.

Forward Association and Backward Association of the Construction Industry
The forward association of the construction industry means that the construction industry's products are consumed by other industries, which significantly influence other industries. The total consumption coefficient can be used to measure the forward association of the construction industry on other industries. Similarly, the backward association of the construction industry means that the demand for materials and services from other industries for the production activities of the construction industry results in its influence on other industries. The total distribution coefficient can measure the backward association of the construction industry on other industries. From the results outlined in Section 4.2, the hotel and restaurant, construction, agriculture, agriculture, metal products, and electricity and hot water production and supply industries are the main industries that have a vital forward association with the construction industry. The nonmetal products, wood processing and furnishing, nonmetal mining, metal products, nonmetal mining, metallurgy, and electrical equipment industries have vital backward associations with the construction industry.

General Influence of the Construction Industry
To reveal the general influences in the driving and driven networks of 30 industries in 30 provinces, the driven and driving coefficients of 900 industries were ordered from largest to smallest. The sorted results of the driven coefficients and driving coefficients of the construction industry in 30 provinces are listed in Table 9. Table 9. The general influence of the construction industry. Beijing  25  2  Tianjin  30  2  Hebei  30  2  Shanxi  19  1  Inner Mongolia  29  1  Liaoning  29  2  Jilin  27  2  Heilongjiang  26  1  Shanghai  25  1  Jiangsu  26  2  Zhejiang  27  1  Anhui  28  1  Fujian  27  1  Jiangxi  28  2  Shandong  29  4  Henan  29  3  Hubei  17  1  Hunan  29  1  Guangdong  29  1  Guangxi  29  1  Hainan  24  1  Chongqing  30  1  Sichuan  29  1  Guizhou  16  1  Yunnan  23  1  Shaanxi  28  1  Gansu  24  1  Qinghai  20  1  Ningxia  23  1  Xinjiang  22  2   Table 9 shows that the sorted results are opposite in the driven network and the driving network. In the driving network, the ranked results of the construction industry in the 30 provinces are of little importance. The influence of the construction industry is not proportional to its contribution to China's economic output. This shows that the construction industry has not formed a close connection with the entire industrial economy and has a limited effect on other industries from the perspective of driving ability. However, from the perspective of the driven network, the construction industry is the most important industry, having significant driven ability on the entire industry. The production activities of the construction industry in 30 provinces require large amounts of materials and services from other industries, which facilitates the production activities of other industries. In summary, the driven ability by far exceeds the driving ability of the construction industry in the 30 provinces in China.

Conclusions
The construction industry is a pillar industry facilitating the economic development of China. However, the industry's development is confronting a series of challenges including its lack of efficiency, high level of pollution, capital-intensive nature, and unreasonable structure. The causes of these challenges are not only due to the construction industry, but also other industries that have correlations with the construction industry. This paper employed the total consumption coefficient and the total distribution coefficient to reveal the influencing power of the construction industry. Based on the total consumption coefficient and total distribution coefficient, the driven coefficient and driving coefficient were used to reflect the general effect on the entire industry network. The driven and driving networks were constructed using the total consumption coefficient and the total distribution coefficient to reveal the critical positions of industries in the network.
From the results, it can be seen that the top 10 industries ordered by the total consumption coefficient include industries both from the native provinces and non-native provinces. However, from the perspective of the total distribution coefficient, the top 10 industries ordered by the total distribution coefficient are all located in the native provinces. This reveals the significant immobility of the construction industry products. The products are almost fixed on the ground, representing fixed assets. Besides, the densities of the complex driving and driven networks of 900 industries are 0.1155 and 0.0018, respectively. The density of the complex network is relatively sparse. The efficiency of resource and information circulation in the complex network of industries can be considerably improved. In addition, there is significant difference between the degree of point centrality in the driven network and in the driving network. On one hand, the degrees of point-in centrality and point-out centrality in the driving network are both less than in the driven network. The driving ability for other industries is far less than the driven ability. It means that the construction industry is the most important consumer in the ecological network of all 30 industries. On the other hand, the hotel and restaurant, construction, agriculture, metal products, electricity, and hot water production and supply industries are the main industries that have a vital forward association with the construction industry. The nonmetal products, wood processing and furnishing, nonmetal mining, metal products, metallurgy, and electrical equipment industries have vital backward associations with the construction industry.
Notably, in the driving network, the ranked results of the construction industry in 30 provinces are of little importance. This shows that there are no robust correlations between the construction industry and other industries, which reflects that the construction industry has limited effects on other industries. However, the perspective of the driven network reflects that the construction industry is the most important industry, revealing that the production activities of the construction industry in 30 provinces require large amounts of materials and services from other industries. Therefore, the construction industry further facilitates the production activities of other industries. In summary, the driven ability of the construction industry far exceeds its driving ability in the 30 provinces. The different characteristics of the construction industry in the driven network and the driving network are worthy of further discussion.

Conflicts of Interest:
The author declares no conflict of interest.