Funding for this research was provided by:
Ministry of Education (MOE) Project of Humanities and Social Sciences on the West and the Border Area (20XJC910001)
National Social Science Fund of China (21XTJ001)
National Natural Science Foundation of China (12001068, 11671060)
National Natural Science Foundation of China (72071019)
Article History
Received: 12 November 2021
Revised: 12 March 2022
Accepted: 17 May 2022
First Online: 8 June 2022