Southwest China includes Chongqing , Sichuan , Guizhou , Tibet , and Yunnan . This area is well known for its rugged terrain of mountains, hills and deep basins. It mainly has a subtropical climate. The area has a size of 2.35 million sq km, and supports a population of 180 million (as of 1990). Besides the Han Chinese, there are Tibetan, Yi, Dai, Bai, Zhuang, Miao and other ethnic minorities.
The area traditionally has a weak economy, and has been a relatively poor region. But the region has abundant resources, and has great potential in the area of tourism, hydropower, metallurgy, machinery, chemicals, and defense industry.