This research was supported by Philosophy and Social Science Foundation of Hunan Province (16YBQ009) and National Social Science Foundation on Education Research Project for Young Scholars (CLA160199) in China, which was awarded to Gui Chen, the paper’s first author. This research was also partially supported by the Presidential Fund of the Chinese University of Hong Kong, Shenzhen, to Jinbo He (PF.01.001428) and Xitao Fan (PF.01.000670).