1. School of Economics and Management, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2. Antai College of Economics and Management, Shanghai Jiao Tong University, Shanghai 200030, China
3. School of Economics and Management, Beijing University of Chemical Technology, Beijing 100029, China
4. School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China