Review Reports

Round 1

Reviewer 1 Report

Comments for author File: Comments.pdf

Author Response

Please see the attachment

Author Response File: Author Response.docx

Reviewer 2 Report

Dear authors, in attached file you will found my comments. Kind regards, Reviewer

Comments for author File: Comments.pdf

Author Response

Please see the attachment

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

The manuscript can be accepted.

Author Response

Thank you for your approval, we have studied the paper carefully again and have made details correction, especially for the "Conclusions" and "Reference". Revised portion are marked in red in the paper. 

Best wishes !

Author Response File: Author Response.docx

Reviewer 2 Report

The paper by Chen et al. represents a qualitative scientific work but have few mistakes and unanswered questions. I have few objections. Conclusion’s part needs to be more precisely written with less numbers (repetition of results) and more concluded remarks. At the end, I am wondering about references. This topic is actual in other parts of the world not only in China. I encourage authors to revise their references and put some references from other parts of the world. Therefore, I recommend acceptation of the paper with minor revision.

Author Response

Thank you very much for your comments and suggestions. We have studied the paper carefully again and have made details correction which we hope to meet with approval. Revised portion are marked in red in the paper. 

Best wishes !