Funding for this research was provided by:
National Natural Science Foundation of China (31761143001 and 31870316)
Minzu University of China (2022GJAQ04, 2022ZDPY10 and 2020MDJC03)
Received: 16 August 2022
Accepted: 26 September 2022
First Online: 14 October 2022
: All informants were asked for their free prior informed consent before interviews were conducted.
: Not applicable.
: The authors declare that they have no competing interests.