Funding for this research was provided by:
Natural Science Grant of Xinjiang Uygur Autonomous Region (2019D01C048)
Fundamental Scientific Research Business Expenses of Central Universities (CHD300102219525)
Article History
Received: 18 January 2020
Accepted: 17 May 2020
First Online: 24 May 2020
Competing interests
: The authors declare that they have no competing interests.