Xiangyu Tian, Professor, School of Accounting, Shanxi University of Finance and Economics, China. Email: T7668002@163.com; Shenxiang Xie, Professor, School of International Economics and Trade, Shandong University of Finance and Economics, China. Email: xieshx@sdufe.edu.cn; Qi Wang, Staff Member, Bank of China, China. Email: lucky_qi@yeah.net; Xiaosong Wang (corresponding author), Associate Professor, School of Economics, Renmin University of China, China. Email: xiaosong10@sina.com.