What role did mountains and deserts play in the development of China's civilization?

Mountains and deserts served as natural barriers that shaped the development of China's civilization by influencing trade, migration, and cultural exchange. The Himalayas and the Tian Shan mountains protected early Chinese states from invasions, fostering stability and allowing for the growth of agriculture and urban centers. Conversely, the vast deserts, such as the Gobi, limited movement and interaction with neighboring regions, promoting a distinct Chinese cultural identity. Overall, these geographical features helped to define the boundaries of Chinese civilization while also facilitating its internal cohesion.