Xiao, Fengqiu
Zheng, Zhiwei
Zhang, Heyi
Xin, Ziqiang
Chen, Yinghe
Li, Yiwei
Funding for this research was provided by:
the Major Project of the National Social Science Foundation of China (14ZDB160)
the major projects of Humanity and Social Science base of the Ministry of Education in China (12JJD190001)
the grant from Beijing Social Science Foundation of China (12JYA003)