Lin, Qiang
Li, Tongtong
Cao, Chuangui
Cao, Yongchun
Man, Zhengxing
Wang, Haijun
Funding for this research was provided by:
National Natural Science Foundation of China (61562075)
Gansu Provincial First-class Discipline Program of Northwest Minzu University (11080305)
Program for Innovative Research Team of SEAC ([2018] 98)
Key Laboratory of China’s Ethnic Languages and Information Technology of Ministry of Education (KFKT202009, KFKT202010)
Article History
Received: 30 October 2020
Accepted: 28 January 2021
First Online: 19 February 2021
Competing interests
: The authors declare no competing interests.