Does Entrepreneurial Orientation Lead to Successful Sustainable Innovation? The Evidence from Chinese Environmentally Friendly Companies

This research examines the linkage between entrepreneurial orientation and sustainable innovation. Research shows that the effects of entrepreneurial orientation on the exploitation and exploration of sustainable innovation are significantly positive, whereby absorptive capacity acts in a significant mediating role. The interaction between entrepreneurial orientation and absorptive capacity helps organizations overcome organizational inertia and strengthen the sustainability of innovation. By introducing the absorptive capacity theory and the view of organizational inertia, we have conducted empirical research on 392 Chinese environmentally friendly companies that have passed China’s national high-tech enterprise certification. We verified the relevant hypotheses in our framework in a structural model analysis using Mplus. To further look at the interaction terms of potential and realized absorptive capacity, we used PROCESS in SPSS to evaluate the conditional effects of absorptive capacity on coefficient paths between entrepreneurial orientation and the two types of innovation. The results show that entrepreneurial orientation improves the absorptive capacity of organizations, thereby promoting their sustainable innovation. Furthermore, based on the theory of sustainable innovation, we proved the positive impact of realized and potential absorptive capacity on the exploitation and exploration of sustainable innovation. Organizations could balance exploitation and exploration to implement sustainable innovation by adjusting their potential and realized absorptive capacities. Our results can help environmentally friendly organizations adjust the combination of entrepreneurial orientation and absorptive capacity to overcome organizational inertia, manage exploitation and exploration, and implement sustainable innovation.


Introduction
In order to obtain sustainable returns and to build environmentally friendly organizations, it is increasingly important to develop sustainable innovation [1]. To adapt to the complex and changeable environment while reconciling economic, environmental, and social goals, organizations need to explore new areas of knowledge [2,3], and this is especially true for high-tech companies, as they are increasingly inclined to adopt multiple forms of innovation. Many researchers believe organizations, to establish sustainable competitive advantages, need to become dualized and carry out both exploitation and exploration [4,5]. Exploitation enriches and expands customer value by deepening the understanding of existing assets, products, and services to provide organizations with incremental innovation opportunities. Exploration absorbs knowledge from outside an organization, develops new products, helps create new customer value, and provides organizations with breakthrough innovation opportunities. Compared with exploitation, exploration carries greater risks

Sustainable Innovation and Entrepreneurial Orientation
Entrepreneurial orientation, which gives organizations strategic flexibility in turbulent environments, is a top-level strategic framework of innovating, preempting, and risk-taking, intended to redistribute and configure organizations' resources, processes, and strategies to overcome discontinuities in the environment [20]. Previous studies have pointed out that entrepreneurial orientation reflects the tendency of organizations' resource-based entrepreneurial activities [21,22]. Over the years, researchers have tried to understand how entrepreneurial orientation affects corporations' innovation [13]. Some studies provide evidence that the effect of entrepreneurial orientation on sustainable innovation is contingent on different boundary conditions [13]. All dimensions of entrepreneurial orientation significantly and positively impact sustainable innovation [23].
Sustainable innovation, as an organization's integration of new ideas and practices, is affected by existing processes and routines [8,24]. It is the basic driving factor by which organizations adapt to rapid changes and highly competitive environments [25]. In this sense, the exploitation and exploration of sustainable innovation are both subject to organizational structure and constraints on processes, and they may manifest different effects of organizational inertia. To overcome organizational inertia, organizations often enact proactive yet risky innovations in their markets to overcome the stability of products, processes, and policies of organizations, and seek to change the competitive environment [26], as they pursue, discover, and create new opportunities in their decision-making processes to maintain a competitive advantage [27]. Therefore, it is possible that organizational inertia complicates the relations of entrepreneurial orientation and sustainable innovation.

Roles of Absorptive Capacity
Entrepreneurial orientation highlights how to act-that is, the procedures, practices, and decision-making activities that lead to new entry behaviors, including trials of new technologies, grasping market opportunities, and making risky investments [28]. Meanwhile, absorptive capacity suggests a series of organizational routines and processes to acquire, assimilate, transform and utilize knowledge [29]. Studies have confirmed that absorptive capacity, combining existing knowledge and new technologies, plays a significant mediating role between corporate strategic orientation and exploratory activities [30]. Organizations can distribute knowledge quickly in a rapidly changing environment, reinforcing the view that absorptive capacity could play a mediating role in the impact of entrepreneurial orientation on organizational innovations [31], so that organizations have the ability to flexibly use, organize, and manage resources in a dynamic environment [32], and significantly impact sustainable innovation [33].
As a corporate-level strategic approach, entrepreneurial orientation encourages and supports organizations' transformations of absorbed knowledge into value-creating collections of resources [34] in order to seek new organizational growth and opportunities for renewal [35]. Based on the previous study, we propose that entrepreneurial orientation can promote the capabilities and development processes of both potential and realized absorptive capacity, thereby improving sustainable innovation. Potential absorptive capacity is regarded as the ability to acquire and assimilate external knowledge, while realized absorptive capacity contains the transformation and exploitation dimensions of absorptive capacity [29]. We take the view of Zahra and George, because their classification of absorptive capacity could better help us understand how entrepreneurial orientation contributes to different types of innovation [36]. This view informs our research model and the following hypotheses, as shown in Figure 1.

Entrepreneurial Orientation and Absorptive Capacity
Entrepreneurial orientation enhances an organization's acceptance of uncertainty and its curiosity in seeking knowledge. It encourages the organization to gather diverse sources of expertise, deepens the horizontal and vertical flows of knowledge, and promotes the organization's unconventional thinking. Information can help organizations deviate from the existing cognitive framework, and it can help units overcome differences, form the ability to assimilate new knowledge and improve its efficient conversion [37]. Furthermore, as entrepreneurial orientation reflects an organization's tendency to make decisions and behaviors regarding new products or services that may be produced, it makes the organization innovative. Given this tendency, the organization may invest more in acquiring and assimilating knowledge and resources [7]. Moreover, entrepreneurial orientation's proactive features make organizations more sensitive to externally acquired knowledge, because organizations can discover trends and opportunities ahead of their competitors, use knowledge-based resources, and implement innovations for potential markets [38]. Therefore, entrepreneurial orientation promotes the acquisition and assimilation of knowledge. This is our first hypothesis.

Hypothesis 1 (H1):
Entrepreneurial orientation has a positive correlation with potential absorptive capacity.
Entrepreneurially oriented organizations are often creative about integrating knowledge-based resources; they support self-iteration and are good at seeking the highest possible return from available resources [39]. Entrepreneurial orientation thus encourages organizations to transform, use knowledge to discover new opportunities, and improve their ability to allocate knowledge-based resources with commercial value [40]. Entrepreneurial orientation leads organizations to take risks, to tolerate mistakes, to encourage employees' autonomy, and to support organization members' continuous reflection on existing products and services. This benefits organizations as they integrate new and existing knowledge to create appropriate redundancy. Furthermore, entrepreneurial orientation has the characteristics of competitiveness and an aggressive outlook, promoting an organization's continued attention to the environment, improving the speed and frequency of internal decision-making, and strengthening the organization's adaptability to changes in the environment. Therefore, entrepreneurial orientation promotes the transformation and use of knowledge. This is our second hypothesis.

Entrepreneurial Orientation and Absorptive Capacity
Entrepreneurial orientation enhances an organization's acceptance of uncertainty and its curiosity in seeking knowledge. It encourages the organization to gather diverse sources of expertise, deepens the horizontal and vertical flows of knowledge, and promotes the organization's unconventional thinking. Information can help organizations deviate from the existing cognitive framework, and it can help units overcome differences, form the ability to assimilate new knowledge and improve its efficient conversion [37]. Furthermore, as entrepreneurial orientation reflects an organization's tendency to make decisions and behaviors regarding new products or services that may be produced, it makes the organization innovative. Given this tendency, the organization may invest more in acquiring and assimilating knowledge and resources [7]. Moreover, entrepreneurial orientation's proactive features make organizations more sensitive to externally acquired knowledge, because organizations can discover trends and opportunities ahead of their competitors, use knowledge-based resources, and implement innovations for potential markets [38]. Therefore, entrepreneurial orientation promotes the acquisition and assimilation of knowledge. This is our first hypothesis.

Hypothesis 1 (H1):
Entrepreneurial orientation has a positive correlation with potential absorptive capacity.
Entrepreneurially oriented organizations are often creative about integrating knowledgebased resources; they support self-iteration and are good at seeking the highest possible return from available resources [39]. Entrepreneurial orientation thus encourages organizations to transform, use knowledge to discover new opportunities, and improve their ability to allocate knowledge-based resources with commercial value [40]. Entrepreneurial orientation leads organizations to take risks, to tolerate mistakes, to encourage employees' autonomy, and to support organization members' continuous reflection on existing products and services. This benefits organizations as they integrate new and existing knowledge to create appropriate redundancy. Furthermore, entrepreneurial orientation has the characteristics of competitiveness and an aggressive outlook, promoting an organization's continued attention to the environment, improving the speed and frequency of internal decision-making, and strengthening the organization's adaptability to changes in the environment. Therefore, entrepreneurial orientation promotes the transformation and use of knowledge. This is our second hypothesis.

Hypothesis 2 (H2):
Entrepreneurial orientation has a positive correlation with realized absorptive capacity.

Absorptive Capacity and Innovation
Organizations' sustainable innovation depends on the mechanisms for knowledge management that determine organizational transfer and the use of knowledge [41]. Organizations with a high absorptive capacity look out for opportunities in emerging markets and will be active in exploring new opportunities. In order to carry out sustainable innovation, organizations invest large amounts in areas related to absorptive capacity [42]. This allows them to accelerate their transformation of knowledge into technologies, products, and services. In this process, organizations with strong capabilities in specific fields are more likely to search for more local and proximal knowledge, and to combine existing know-how reserves to initiate improvements in existing processes, improve efficiency, and reduce costs. In this way, a company can obtain a sustainable advantage [17]. Furthermore, as knowledge accumulates, the ability to transform and use external knowledge becomes stronger, enabling the company to reinforce its existing knowledge and give positive feedback between learning and experience [43]. Moreover, in a turbulent external environment, the more efficient conversion and use of knowledge can help organizations adapt more quickly to the requirements of environmental sustainability, promote exploitation, and perform in a reliable manner [44]. Therefore, we hypothesize that absorptive capacity supports exploitative innovation.

Hypothesis 3 (H3a).
There are positive relationships between an organization's potential absorptive capacity and its exploitative innovation.

Hypothesis 3 (H3b).
There are positive relationships between an organization's realized absorptive capacity and its exploitative innovation.
We believe the acquiring, transformation and use of knowledge also has a positive impact on exploration. The efficient acquiring, transferring and using of knowledge can help organizations quickly identify new trends in technology, improving their ability to adopt new technologies [29] and to innovate beyond the boundaries of their current technologies [45]. Meanwhile, the better conversion and use of knowledge can help organizations to more effectively apply new knowledge for business purposes, increasing their certainty in exploratory innovation and enhancing their confidence to continue investing in such innovation. Our fourth hypothesis is as follows:

Hypothesis 4 (H4a).
There is a positive relationship between an organization's potential absorptive capacity and its exploratory innovation.

Hypothesis 4 (H4b).
There is a positive relationship between an organization's realized absorptive capacity and its exploratory innovation.
Previous studies have confirmed that absorptive capacity affects organizations' paths of exploration and exploitation for sustainable innovation [36]. However, realized and potential absorptive capacity may function differently because potential absorptive capacity focuses on the "inter" perspective of organizational capabilities, while realized absorptive capacity focuses on the "intra" perspective [46,47]. Adjusting through the interaction of realized and potential absorptive capacity enables organizations to balance the tensions generated by exploitation and exploration [48]. Although innovation is the result of organizational transformation and use of knowledge, the organization still needs to update its knowledge structure by assimilating new external knowledge. This is how the internal knowledge structure becomes more complete. Because exploratory innovation requires organizations to stop depending on existing knowledge, successful exploratory innovation requires their effective acquisition and assimilation of new external knowledge [49,50].
Meanwhile, exploitative innovation is based on existing know-how and is related to improving technologies that already exist. It is the result of deepening and expanding existing knowledge and experience. The acquisition and absorption of external knowledge may hinder employees' focus on the task or work of their organization, and this hinders their enterprise's effective transformation and use of knowledge. Therefore, we propose that potential absorptive capacity regulates both realized absorptive capacity and exploratory innovation, and that it limits both realized absorptive capacity and exploitative innovation.
Hypothesis 5a (H5a). Potential absorptive capacity augments realized absorptive capacity such that the two jointly have a negative impact on exploitative innovation.
Hypothesis 5b (H5b). Potential absorptive capacity augments realized absorptive capacity such that the two jointly have a positive impact on exploratory innovation.

Participants
For this article, we found official information on China's high-tech enterprise certification organization (www.innocom.gov.cn, accessed on 6 September 2020). We identified 700 companies in China's Optics Valley, a famous high-tech industrial park in Middle China hosting many leading domestic pharmaceutical companies and optoelectronic information companies. Most of these companies are environmentally friendly enterprises committed to taking social responsibility through sustainable innovation. Environmentally friendly enterprises are those that meet the "Interpretation of the National Environmentally Friendly Enterprise Indicators" [51]. To achieve sustainable innovation, enterprises need to improve existing technologies, and at the same time explore new markets, develop new products, and obtain new opportunities through exploratory innovation. These factors allowed us to collect data on entrepreneurial organizations.
In total, we received 392 valid questionnaires from 700 submitted. The respondents were middle and senior managers, 89 of whom were responsible for R&D departments. These executives had at least 2 years' experience in their current positions and were required to discuss their companies' markets and knowledge practices, including their own activities. The participants' characteristics are shown in Table A1. They represented high-tech companies of all kinds, 84% having been high-tech companies for at least 3 years and 43.7% having an average annual profit of CNY 50 million in 3 years. Some participants' institutions also had subsidiaries in other parts of China.

Procedure
Following the procedures followed in prior research [30,52], we developed questionnaires for research models and used existing tools to measure each construct. First, we adapted all the measurement items from the existing literature (see Table A2). A sevenpoint Likert scale was used to measure each reflective construct containing at least three items. Second, we hired a professional translator to translate the original English into Chinese. Then, we invited one native user of English with fluency in Chinese to translate it back. Our research team compared the two versions, evaluated the quality of the questionnaire, and made several modifications. Finally, we piloted the questionnaire over the phone with chairs at nine high-tech companies whose annual profits were more than USD 100 million. We fine-tuned the questionnaire according to their feedback.
We have taken several measures to ensure the statistical generalizability and validity of our sample. First, we obtained a list of 700 companies in China's Optics Valley from a business research company. We have carefully checked whether the companies on the list passed the ISO 14001 environmental management requirement, to confirm whether these companies are environmentally friendly. Optics Valley is an important high-tech development zone in China, which has incubated many enterprises. Samples from Optics Valley can provide us with data on different levels of entrepreneurial orientation and sustainable innovation. Second, we posted the questionnaire to managers and called them to ensure whether they had obtained and responded effectively to the questionnaire. Our response rate was 56%, which is acceptable and could signify that our research has non-response bias [53]. Third, we also carried out a wave analysis to test for non-response bias, as the late responses were presumed to be similar to no responses [30]. To examine differences in key constructs between early and late responses, we performed a t-test. The results for entrepreneurial orientation (p = 0.42), exploratory (p = 0.10) and exploitative innovation (p = 0.99), and potential (p = 0.92) and realized absorptive capacity (p = 0. 25) showed no significant differences between the two waves of respondents (p values derived from t). The t-test results show that our study is free from non-response bias. Finally, we used two methods to evaluate common method bias (CMB) in our research. On one hand, using the AMOS software package, we developed a model comprising one single factor with all the reflective measurement items. The model exhibited poor fit (RMSR = 0.114, higher than 0.08; GIF = 0.55 lower than 0.9; AGFI = 0.502 lower than 0.9), indicating that CMB was not a threat for our study [53]. On the other hand, we evaluated all variance inflation factors (VIF) via a full collinearity test. The largest VIF was 2.01, indicating that our measurement model was not threatened by potential CMB [30].

Measurement Model
In Table A3, the value of Cronbach's α for all variables was larger than 0.7, while the composite reliability value for each variable was over 0.8. Most of the standard loadings were above 0.7. Table A3 shows descriptive statistics and a correlation matrix. It can be seen from the table that this study's measurement tool had good internal consistency and reliability. Specifically, this study adapted the scale of entrepreneurial orientation given by Hughes and Morgan [54]. Scholars highlight that in a given context, the dimensions of entrepreneurial orientation may vary independently of each other [28]. Therefore, prior empirical studies have tended to examine each sub-dimension within the entrepreneurial field. It is worth noting that risk-taking, innovation, enthusiasm, competitive radicalism, and autonomy are different structures. In addition, an independent examination of the evaluation dimensions of entrepreneurial orientation is helpful to evaluate situations in which the stability of the dimensions themselves or their relationships may change over time. As entrepreneurial orientation in our study was treated as a second-order reflective construct, we conducted a specific confirmatory factor analyses (CFA) model to assess its internal validity. The goodness fit of this CFA model for entrepreneurial orientation was measured as χ 2 /df = 1.319, with a root-mean-square error of approximation (RMSEA) of 0.026, a Tucker-Lewis index (TLI) of 0.983, and a comparative fit index (CFI) of 0.986. All fitting indexes were within the acceptable ranges, so the model was realistic and acceptable. All factor loads were greater than 0.5, so the entrepreneurial derivative table had good structural validity.

Hypothesis Testing
To verify the relevant hypotheses in our framework, Mplus software was used to perform a modeling analysis on the hypothetical model. Figure 2 presents the standardized solution results of the hypothetical model. The fitting situation of the model was measured as χ 2 /df = 2.487, RMSEA = 0.057, CFI = 0.955, and TLI = 0.874. Besides TLI being slightly lower than 0.9, the fitting indexes performed well; the model was acceptable. Table 1 shows the standardized regression estimations, showing that the impacts of entrepreneurial orientation on potential (β = 0.110, p < 0.05) and realized absorptive capacity (β = 0.160, p < 0.05) were both positive and significant. Therefore, our results support H1 and H2. We also noticed that the impacts of potential absorptive capacity on exploitative (β = 0.198, p < 0.001) and exploratory (β = 0.162, p < 0.001) innovation were positive and significant, indicating that H3a and H3b are supported. The same positive and significant effects on realized absorptive capacity were also identified (β exploitative = 0.224, β exploratory = 0.223). Therefore H4a and b are supported.
Sustainability 2021, 13, x FOR PEER REVIEW 8 of 18 Figure 2. Results of SEM model (standardized estimate). Note: EO refers to entrepreneurial orientation; PAC and RAC refer to potential and realized absorptive capacity; EEI refers to exploitative innovation; EYI refers to exploratory innovation. Table 1 shows the standardized regression estimations, showing that the impacts of entrepreneurial orientation on potential (β = 0.110, p < 0.05) and realized absorptive capacity (β = 0.160, p < 0.05) were both positive and significant. Therefore, our results support H1 and H2. We also noticed that the impacts of potential absorptive capacity on exploitative (β = 0.198, p < 0.001) and exploratory (β = 0.162, p < 0.001) innovation were positive and significant, indicating that H3a and H3b are supported. The same positive and significant effects on realized absorptive capacity were also identified (βexploitative = 0.224, βexploratory = 0.223). Therefore H4a and b are supported. We see a slight difference when considering the interaction term of realized and potential absorptive capacity. The interaction term of realized and potential absorptive capacity showed a significantly negative level of path coefficient for exploitative innovation (β = −0.121, p < 0.05). The negative path coefficient shows that the joint effect of potential and realized absorptive capacity on exploitative innovation was less than the sum of their Figure 2. Results of SEM model (standardized estimate). Note: EO refers to entrepreneurial orientation; PAC and RAC refer to potential and realized absorptive capacity; EEI refers to exploitative innovation; EYI refers to exploratory innovation. We see a slight difference when considering the interaction term of realized and potential absorptive capacity. The interaction term of realized and potential absorptive capacity showed a significantly negative level of path coefficient for exploitative innovation (β = −0.121, p < 0.05). The negative path coefficient shows that the joint effect of potential and realized absorptive capacity on exploitative innovation was less than the sum of their individual effects. The interactive effect of realized and potential absorptive capacity on the path coefficient for exploratory innovation reached a positive significant level (β = 0.266, p < 0.05). The positive path coefficient highlights that the joint effect on exploitative innovation of realized and potential absorptive capacity was greater than the sum of their individual effects. Therefore, hypotheses 5a and 5b are supported.
To test our results and take a further look at the interaction terms, we used PROCESS in SPSS to evaluate the conditional effects of absorptive capacity on coefficient paths between entrepreneurial orientation and the two types of innovation. Since in statistical models interaction and moderation are measured in the same way [55], we tested the conditional effects of realized and potential absorptive capacity in two separate models using PROCESS. The results, shown in Table 2, highlight that when potential absorptive capacity rises from 4.66 to 6.50, the effect on exploitative innovation of realized absorptive capacity decreases from 0.36 to 0.11 (p > 0.1, not significant). This indicates a substitute relationship between the two types of absorptive capacity [56]. Meanwhile, we also noticed that the effect of realized absorptive capacity-that is, the capability to exploit external knowledge-on exploratory innovation increased from −0.03 (p > 0.1, not significant) to 0.43. This indicates the two dimensions of absorptive capacity were complementary in this relationship. When observing the conditional effect changes of potential absorptive capacity, we derived the same result. We also tested the indirect effects of both types of absorptive capacity on the linkage of entrepreneurial orientation to innovation. The results shown in Table 3 highlight that only the indirect effects are significant, as their confidence intervals do not contain zero. The results reveal the full mediating roles of both types of absorptive capacity in the relationship between entrepreneurial orientation and both type of sustainable innovation.

Discussion and Implications
These findings enrich the existing literature by showing how corporate strategies and capabilities match. Entrepreneurial orientation may promote absorptive capacity, thereby accelerating sustainable exploitation and exploration over time and inhibiting organizational inertia. These findings not only reveal the influence mechanism of entrepreneurial orientation on sustainable innovation [57], but also point out ways for startups to avoid failure when pursuing sustainable development. We believe corporate entrepreneurial orientation and absorptive capacity together constitute dynamic capabilities; companies can rely on this ability to cope with social responsibility [19]. We have thus supplemented empirical evidence in this field.

Theoretical Implications
First, this study introduces the perspective of absorptive capacity and explores the relationship between entrepreneurial orientation and sustainable innovation. As the evaluation criteria of sustainable innovation may be different in countries due to different degrees of spatial, temporal, and cultural embeddedness, research in developing countries usually studies the impact of policies on sustainable innovation from the perspective of stakeholders, while that in developed countries focuses on how to maintain competitiveness while carrying out sustainable innovation [58][59][60]. Therefore, it is necessary to investigate how to leverage entrepreneurial orientation for different types of sustainable innovation in the context of China. Believing that absorptive capacity is an important antecedent variable in the process of organizations' development of exploration and exploitation toward sustainable performance [61], we examined the linkage from entrepreneurial orientation to exploitation and exploration through empirical research. Prior research regarded absorptive capacity as a moderator in the relation between entrepreneurial orientation and innovation [13], and we found that entrepreneurial orientation is not bound to sustainable innovation in a simple linear relationship. As an organizational strategy, entrepreneurial orientation influences exploration and exploitation through the mediating effects of two types of absorptive capacity. In general, a positive correlation holds between entrepreneurial orientation and absorptive capacity, which has a positive impact on sustainable innovation.
Second, our results provide empirical evidence that, through absorptive capacity, entrepreneurial orientation is positively related to both types of sustainable innovation. Previous studies highlight the role of entrepreneurial orientation for sustainable innovation, in that a firm's risk-taking and openness is critical to sustainable innovation [59]. However, they did not address innovation, or analyze the different mechanisms shaping entrepreneurial orientation towards different types of innovation via absorptive capacity. The support of new processes built through exploration coincides with organizations' entrepreneurial orientation. In fact, due to organizational inertia, exploration is strongly resisted in organizations with deep-rooted experience [62]. A company with strong capabilities in its current field may rationally reduce its exploratory behavior due to complacency, incompatible technological paths, and cost considerations [63,64]. Even if an enterprise has an entrepreneurial orientation, its innovative, active risk-taking behavior may be ineffective unless it does have the absorptive capacity to integrate diverse knowledge. By actively acquiring and absorbing new market-related knowledge, it is possible to achieve a more effective transformation of entrepreneurial activities. Only when absorptive capacity improves can the acquiring and assimilating diverse external knowledge be promoted and exploratory innovation be strengthened [65].
Third, we separately examined the impacts of two types of absorptive capacity on sustainable innovation, including exploration and exploitation. Previous research has often treated absorptive capacity as a general capability [61], or regarded potential absorptive capacity as an antecedent of realized absorptive capacity [46]. We found that the interaction between realized and potential absorptive capacity has different effects. Regarding exploitative innovation, our results highlight that potential absorptive capacity augments realized absorptive capacity such that the two have a jointly positive impact on exploitative innovation. On the one hand, as organizations continue to acquire and use knowledge from outside and update their reserves of knowledge, potential absorptive capacity can enhance their ability to discover new ideas and innovation by transforming knowledge into the capacity for sustainable development. On the other hand, the transformation of knowledge enhances an organization's understanding of potential markets, promotes the integration of existing and new technologies in enterprise, and increases the certainty of exploratory innovation. We also find that potential absorptive capacity augments realized absorptive capacity, and that the two have a jointly negative impact on exploitative innovation. This may be because, although exploitative innovation needs to strengthen the flow of information between and within organizations and is more inclined to transform and use internal knowledge, acquiring and assimilating external knowledge promotes the flexible use and coordination of resources. Such use and coordination can support various technologies and products, so that companies can ease organizational inertia and easily switch to new platforms [66].

Practical Implications
First, our findings provide a deeper understanding of the linkage between entrepreneurial orientation and sustainable innovation. We have proposed to enrich the idea of using entrepreneurially oriented organizations' absorptive capacity to carry out sustainable innovation. Entrepreneurial orientation encourages organizations to invest in acquiring resources and applying knowledge for environmental process and product innovation [67], which are positively related to sustainable innovation performance [68]. To achieve sustainable innovation, organizations often face the dilemma of investing limited resources in the development of existing products or in exploring new products. Organizations should establish an effective system for transforming external support into internal knowledge to achieve sustainable development through resource and technology restructuring. Managers should realize that absorptive capacity helps organizations be flexible and apply diverse knowledge for exploitation and exploration.
Second, to balance exploratory and exploitative innovation, we suggest start-ups cultivate absorptive capacity and balance their innovation. Potential and realized absorptive capacities show a complementary effect on exploratory innovation, which then shows a substitutive effect on exploitative innovation. This result highlights that organizations could adjust their capabilities to absorb (as well as transform and apply) external knowledge to form different configurations of exploration and exploitation. On one hand, organizations should strengthen internal knowledge exchanges, introduce knowledge management mechanisms that adapt to sustainable innovation, and prevent organizations from blindly developing adventurous, innovative, and proactive behaviors [69]. On the other hand, organizations should establish the ability to acquire, absorb, and utilize new technology in the flexible allocation of knowledge resources [70], and provide knowledge guarantees for exploring unknown areas while avoiding the ability trap.
Third, high-tech enterprise entrepreneurship has the characteristics of high technology density, long R&D cycles, large R&D investments, and high returns on new products. To achieve sustainable innovation, organizations must consider both long-term and short-term returns. Entrepreneurially oriented organizations believe corporate competitive advantages stem from innovation and risky investment, and they advocate new opportunities to guide customer needs and pursuits [71]. Organizations can be brave enough to discover new opportunities while taking certain risks, and they can take advanced innovative actions to seize these opportunities [72]. However, the sustainable development of a company requires immediate business support. Absorptive capacity can help organizations, through the rapid absorption and transformation of knowledge, to issue innovative products that meet current market needs. Therefore, organizations with such characteristics must cultivate entrepreneurial orientation and absorptive capacity at the same time. On one hand, by supporting the development of existing technology, they obtain funds and keep the business going; on the other hand, by stimulating technological exploration, they ensure innovation in the long-term sustainable development of the enterprise.
Fourth, our results also imply that the government can promote sustainable innovation from multiple perspectives. On the one hand, the government can improve the absorptive capacity of enterprises by encouraging the upgrading of industrial clusters and integrating enterprises at different locations of the industrial chain. On the other hand, the government could encourage enterprises to develop an entrepreneurial orientation for green transformation. The government needs to help companies recognize the importance of long-term benefits, promote the flow of knowledge between companies, and strengthen various means of absorptive capacity building. Only in this way can resources be optimally used, and the goal of carbon neutrality be achieved.

Limitations and Directions for Future Research
First, our sample size is limited. Larger sample sizes across different regions may supply greater statistical power. Second, we used cross-sectional data, thus limiting the causal inference between entrepreneurial orientation and sustainable innovation. As we explained, a longitudinal study could extend our work in understanding how to further balance the exploration and development related to entrepreneurial orientation and absorptive capacity. Third, respondents at different organizational levels may deviate in their evaluations of entrepreneurial orientation and other variables. A future pair-matched survey, in which supervisors could answer questions about entrepreneurial orientation and senior managers with relevant experience could answer other questions, would supply more ideal results.
The current study highlights directions for future research. First, the results, based on a general view of organizational inertia, highlight the different potential routes from entrepreneurial orientation to sustainable innovation. Future research could investigate and evaluate the specific organizational inertia in a given environment, such as green transformation. Second, innovation involves more factors than those in our model, especially in the digital era and the green-oriented business world. Further research could extend our model with the consideration of digital or green entrepreneurial orientation. Finally, from the perspective of system dynamics, we believe organizations' innovation may adversely affect entrepreneurial orientation. Future researchers should pay attention to the interaction and evolution of independent variables of sustainable entrepreneurial orientation and sustainable innovation.

Conclusions
In the context of sustainable development, we combine views of organizational inertia and absorptive capacity to investigate the relationships between entrepreneurial orientation and two types of sustainable innovation. Our research fills the existing gap in the relevant literature, as there is currently insufficient evidence concerning Chinese firms' sustainable innovation practices. Our study probed into innovation and absorptive capacity, and analyzed the different mechanisms shaping different types of innovation. With the data set of 392 Chinese environmentally friendly companies, we have empirically verified that entrepreneurial orientation enhances a firms' integration of its existing knowledge with the acquirement of external knowledge, thereby improving both exploratory and exploitative innovation. We have also discovered the mediating role of both potential and realized absorptive capacity in those relationships. In further analyses, the interaction effects of the two absorptive capacities different for the two types of sustainable innovation. The effect was negative for exploitative innovation but positive for exploratory innovation.
The results indicate that potential absorptive capacity and realized absorptive capacity are substitutive to exploitative innovation and complementary to exploratory innovation. This in-depth analysis will help organizations to distribute their resources more effectively, build capabilities, and achieve the required innovations.

EORT1
The term "risk taker" is considered a positive attribute for people in our business.