New cities might be the levers of change that China can pull to switch from an industrializing carbon economy at destructive odds with nature to a postcircular economy in which the sustainability and resilience of the economy rests on the management of ecological networks. Cities such as Shenzhen contributed to China’s export model of growth. China is now building cities that will ground an innovation model of growth. Its experimental cities include eco-cities, forest cities, hydrogen cities, smart cities, and sponge cities. China’s city networks are being deepened and extended through the Belt and Road Initiative. They could function as networks of demand for innovative solutions to problems of drought, air and water pollution, wet bulb temperatures, transport congestion, as well as networks of rapid diffusion for climate and energy technologies. The size of China’s city networks means that multinationals cannot stay out of China.