Wang, Xiaoxuan http://orcid.org/0000-0002-0818-9501
Liu, Jinrong http://orcid.org/0000-0002-1261-489X
Article History
Received: 15 June 2022
Accepted: 20 September 2022
First Online: 3 October 2022
Competing interests
: The authors declare no competing interests.
: This article does not contain any studies with human participants performed by any of the authors. This article uses mainly the case study method and the historical documentary research method. Our case subjects are universities; as such, experimental data and biological materials are not involved in the analysis of the cases, and none of the historical documents we have cited deal with ethical issues. Therefore, this study does not need to obtain ethical approval.
: This article does not contain any studies with human participants performed by any of the authors.