This work was supported by the National Natural Science Foundation of China [41771493 and 41101407];Wuhan Youth Science and technology plan [2016070204010137];self-determined research funds of CCNU from the basic research and operation of MOE [CCNU15A02001];Natural Science Foundation of Hubei Province, China [2014CFB377 and 2010CDZ005]. The authors thank the National Natural Science Foundation of China (NSFC) (Grant No. 41771493 and 41101407), the Natural Science Foundation of Hubei Province (Grant Nos. 2014CFB377, ZRY2014001235, and 2010CDZ005), China, Wuhan Youth Science and technology plan (Grant No. 2016070204010137) and self-determined research funds of CCNU from the basic research and operation of MOE (Grant No. CCNU15A02001) for supporting this work. The authors are grateful for the comments and contributions of the anonymous reviewers and the members of the editorial team.