Zhou, Qianling
Feng, Xing Lin
Article History
Received: 10 October 2022
Accepted: 23 April 2023
First Online: 2 May 2023
Declarations
:
: This is an official survey, and ethical review and approval were endorsed by China’s National Bureau of Statistics, in accordance with which written informed consent for participation was not needed.
: Not applicable.
: The authors declare that they have no competing interests.