Funding for this research was provided by:
the National Natural Science Foundation of China (41401004)
CAS “Light of West China” program
the Science and Technology plan project of Sichuan province (2016SZ0067)
the Key research and development projects of Sichuan province (2017SZ0041)
NSFC-ICIMOD (41661144041)
Article History
Received: 14 August 2017
Accepted: 2 February 2018
First Online: 15 February 2018