He, Yongxiu
Xiong, Wei
Yang, Binyou
Yang, Hai-yan
Zhou, Jiu-fang
Cui, Ming-li
Li, Yan
Funding for this research was provided by:
Beijing Municipal Social Science Foundation (17YJC029)
Technology Innovation Project of Changde Economic Research Institute in 2020
Fundamental Research Funds for the Central Universities (2652019083)
National Natural Science Foundation of China (51978443)
Article History
Received: 29 September 2020
Accepted: 30 August 2021
First Online: 8 September 2021