With the adoption of the Paris Agreement,global strategies for addressing climate change have shifted from a top-down,mandatory emission reduction approach to a bottom-up,nationally determined contribution model.Subnational actors have increasingly emerged as key players in environmental and climate governance at the global level.In particular,cooperation between China and African countries has deepened at the subnational level in various domains such as green economy,clean energy and agriculture.This has led to mutual cooperation among local govern-ments,businesses and community organisations,which continues to be strengthened.However,despite the initial progress,the current collaboration between Chinese and African subnational actors in environmental and climate gov-ernance has faced several deep-rooted challenges,including insufficient funding and technical support,barriers to policy implementation,cultural differences,governance capacity issues and pressure from international competition.To further enhance the effectiveness of subnational cooperation in climate governance,this study offers strategic rec-ommendations for four key areas.The first pertains to leveraging Japan's experience in local cooperation to encourage the involvement of civil society,followed by innovating and refining climate cooperation mechanisms at the subnation-al level between China and Africa.The third denotes the optimisation of the existing cooperation models to strengthen collaboration between local governments and community organisations.Lastly,cooperation should focus on key issues such as climate monitoring,agriculture and blue carbon to promote targeted and effective policy alignment and execu-tion.