Funding for this research was provided by:
Yunnan University (B2018219)
Natural Science Foundation of Guangdong Province (2018A030310305, #2018A0303130046)
National Natural Science Foundation of China (71804201)
Received: 28 October 2020
Accepted: 19 May 2021
First Online: 12 August 2021
: All data used were collected by the online survey via using Wenjuanxing Platform. All of participants have read and signed the informed context before starting the survey. Data were linked and analyzed only by authors who contribute writing the article. The protocol was approved by the Institutional Review Board (IRB) of the Anthropology Department at Sun Yat-sen University, and the approve number is SYSUAD202003221.
: Not applicable.
: All authors declare no competing interests. The authors have completed the ICMJE United Competing Interest Form and declare no further competing interests.