The governance of China under Xi Jinping functions mainly through leading groups. Using the case of water governance, this article examines the interaction between these groups at three levels: the top-level design group, the riverine macroregion groups and the implementation groups. This governance model is designed to avoid nomenklatura failure, restrict fiscal federalism and reduce the agency problem between the centre and local leaders. For the purpose of water governance, China has been divided into five blocs based on river basins, which we call riverine macroregions. Using this approach, the Chinese Communist Party is combining water governance with regional development and enhancing local governments’ collective implementation of central policy.