1. International Business School Beijing Foreign Studies University Beijing 100089 China
2. Shenzhen Key Laboratory of IoT Intelligent Systems and Wireless Network Technology The Chinese University of Hong Kong Shenzhen 518172 China
3. Shenzhen Research Institute of Big Data Guangdong 518172 China
4. Research Center for Contemporary Management Key Research Institute of Humanities and Social Sciences at Universities School of Economics and Management Tsinghua University Beijing 100084 China