*6.2. Discussion*


**Author Contributions:** Conceptualization, B.Q. and P.J.; formal analysis, F.T. and C.L.; investigation, H.Z. and J.L.; writing—review and editing, W.W. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Natural Science Foundation of China (grant number 41772311), the Scientific Research Projects of Zhejiang Department of Housing and Urban and Rural Construction of China (grant number 2017K179, 2019K171) and the International Scientific and Technological Cooperation Projects of Shaoxing University (grant number 2019LGGH1007).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.

**Conflicts of Interest:** The authors declare no conflict of interest.
