1. Research Center for New Structural Economics, Guangzhou University, Guangzhou, Guangdong, China
2. School of Economics and Statistics, Guangzhou University, Guangzhou, Guangdong, China
3. Faculty of Business, City University of Macau, Macau, China
4. Institute of Guangdong, Hong Kong and Macao Development Studies, Sun Yat-sen University, Guangzhou, Guangdong, China
5. School of Social and Public Administration, Lingnan Normal University, Zhanjiang, Guangdong, China