1. General Secretariat of the National Council for Sustainable Development, Phnom Penh 12301, Cambodia
2. R&D Department, Advanced Sustainability Institute (ASI), Phnom Penh 12203, Cambodia
3. Department of Recreational Geography and Tourism, Al-Farabi Kazakh National University, Almaty 317-117, Kazakhstan
4. Department of Architecture, Sungkyunkwan University, Suwon 440-746, Republic of Korea
5. Department of Global Smart City, Sungkyunkwan University, Suwon 440-746, Republic of Korea