Christian Ploberger is an Academic Researcher and Lecturer at the International Studies Program, Department of Political Science, Thammasat University, Bangkok, Thailand. Soavapa Ngampamuan　is Assistant Professor at the Faculty of Political Science, Ramkhamhaeng University, Thailand. Tao Song is Associate Professor at the Institute of Geographical Sciences and Natural Resources (IGSNRR), Chinese Academy of Sciences (CAS), Beijing, China.