Funding for this research was provided by:
National Key R&D Program of China (2016YFC0501906)
Key Research & Development Program of Qinghai Province (2019-SF-145, 2018-NK-A2)
Qinghai innovation platform construction project (2017-ZJ-Y20)
Article History
Received: 10 September 2019
Accepted: 8 January 2020
First Online: 4 February 2020