1. School of Economics and Trade, Guangdong University of Finance, Guangzhou City, Guangdong Province, P.R. China
2. School of Economics and Trade, Guangdong University of Foreign Studies, Guangzhou City, Guangdong Province, P.R. China
3. Institute of Studies for the Greater Bay Area, Guangdong University of Foreign Studies, Guangzhou City, Guangdong Province, P.R. China
4. Institute of Industrial Economics, Jinan University, Guangzhou, China