1. China is implementing a new urban planning trend called "city clusters" (chengshiqun) where two or more cities are combined and connected by transportation systems. 2. The article discusses 19 major Chinese city clusters, dividing them into 3 categories: 3 "hub cities" to become economic zones, 8 "big shots" contributing 3-9% to GDP, and 8 "new stars" in the national 2020 plan. 3. The city clusters are aimed at increasing economic growth, transportation, and influencing migration patterns as part of China's urbanization and will likely impact agricultural land and the environment.