Ding Ding1, Yingnan Jia2, Klaus Gebel3. 1. Prevention Research Collaboration, Sydney School of Public Health, University of Sydney, Sydney, NSW, Australia; The Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia. Electronic address: melody.ding@sydney.edu.au. 2. School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, and Health Communication Institute, Fudan University, Shanghai, China. 3. Prevention Research Collaboration, Sydney School of Public Health, University of Sydney, Sydney, NSW, Australia; School of Allied Health, Australian Catholic University, Sydney, NSW, Australia; Centre for Chronic Disease Prevention, School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, Cairns, QLD, Australia.