Funding for this research was provided by:
National Natural Science Foundation (grant no. 51774258, 41972326)
National Science and Technology Major Project (grant no. 2017ZX05009003-003)
China University of Geosciences (grant no. CUGQYZX1710)
Received: 21 March 2019
Accepted: 21 September 2019
First Online: 25 November 2019
: The researchers proclaim that no contending interests between them.