This research was partially supported by the National Social Science Foundation of China on Education Research Project for Young Scholars (CLA160199) and the Philosophy and Social Science Foundation of Hunan (16YBQ009), both of which were awarded to Gui CHEN. This research was also partially supported by the Presidential Fund (PF.01.000670) of the Chinese University of Hong Kong, Shenzhen, to Xitao FAN. CRediT authorship contribution statement Gui Chen: Conceptualization, Formal analysis, acquisition, Investigation, Writing - original draft, Writing - review & editing. Jinbo He: Conceptualization, Formal analysis, Methodology, Project administration, Writing - original draft, Writing - review & editing. Siwei Wu: Writing - original draft. Bin Zhang: Writing - original draft. Xitao Fan: acquisition, Writing - original draft, Writing - review & editing.