Chong Li, Ph.D. candidate, Wu Yuzhang Honors College, Sichuan University, Chengdu, China. Haiyue Liu, associate professor, School of Business, Sichuan University, Chengdu, China.Correspondence concerning this article should be addressed to Haiyue Liu, No.211 Yong Cui Road, Building 8-1202, High-tech District, Chengdu, China. E-mail: seamoon@vip.sina.com. Ying Jiang, professor, School of Economics, Sichuan University, Chengdu, China.