Han, Junqiang
Meng, Yingying
Funding for this research was provided by:
the National Social Science Foundation (project 15CGL046, 16CGL046)
the Youth Foundation of Humanities and Social Sciences by the Ministry of Education of the People’s Republic of China (15YJCZH118)
the Scientific Research Projects by the State Ethnic Affairs Commission (projects MSQ16002)
the Fundamental Research Funds for the Central Universities (projects CSY16018, 2018QN050)
Article History
Received: 23 February 2019
Accepted: 5 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: The study was exempt from human subjects approval (non-identifiable data; not human subjects).
: Not applicable.
: The authors declare that they have no competing interests.