Conceptualization, H.L., K.C., Y.C. and Y.Z.; methodology, H.L., K.C. and L.L.; validation, H.L., K.C. and L.Y.; formal analysis, H.L. and L.Y.; data curation, H.L. and L.L.; writing—original draft preparation, H.L., K.C. and L.Y.; writing—review and editing, H.L., K.C., L.Y., Y.Z., L.L. and Y.C.; visualization, K.C., Y.Z. and Y.C.; supervision, K.C.; funding acquisition, H.L. All authors have read and agreed to the published version of the manuscript. This study is supported by the National Social Science Foundation of China (No. 18CJY033), National Natural Science Foundation of China (No. 41971216) and the Provincial Social Science Foundation of Hunan (No.18YBQ132).