Funding for this research was provided by:
National Natural Science Foundation of China (31860274)
Yunnan Provincial Science and Technology Department (2017FE468(-155), CXTD201703, 2017IB011)
YNCUB (2017KF009)
Article History
Received: 10 February 2019
Accepted: 10 June 2019
First Online: 17 June 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: There is no conflict of interest in this submission. I declared on behalf of my co-authors that the work described here is original research that has not been published previously, and meet the criteria for authorship. All of the authors approved the manuscript for publication.