Childhood Obesity in China 2 Public health interventions against childhood obesity in China

China is confronted with the challenge of increasing childhood obesity. Although interventions for childhood obesity have been developed, their effectiveness and implementation can vary considerably across nations. In this paper, we review and consolidate the evidence on childhood obesity intervention strategies aimed at multiple levels and components across life, in China. School-based interventions, primarily delivered with group-based dietary and physical education, have shown potential efficacy and can be enhanced by integrating food environment reform and family support. However, most interventional studies were done in eastern and urban areas of China, which highlights the need for attention in regions with insufficient health resources where policies and initiatives are less accessible. In addition, the sparse reporting on implementation design and delivery might hinder the scalability of potentially effective strategies. Amid rapid social and economic development over the past few decades, China faces unique challenges on urbanisation, physical inactivity, and nutritional transitions, necessitating an updated policy agenda for primary prevention of childhood obesity. Structural longitudinal evaluations of public initiatives led by the government and organisations along with inclusive and equitable interventions targeting children of different ages, urban-rural regions, and different ethnic and socioeconomic groups are warranted. Tackling childhood obesity in China needs a cohesive approach that integrates social, economic, cultural, and environmental strategies, combining school-based, family-based, and individual-based approaches, and concerted efforts from multiple sectors and entities within China.