1. School of International Studies, Wenzhou Business College, Wenzhou, People’s Republic of China
2. School of International Studies, University of International Business and Economics, Beijing, People’s Republic of China
3. School of English and International Studies, Beijing Foreign Studies University, Beijing, People’s Republic of China
4. Department of Foreign Languages, University of Chinese Academy of Sciences, Beijing, People’s Republic of China
5. School of Foreign Languages, Chongqing University of Posts and Telecommunications, Chongqing, People’s Republic of China