Chengjiang City is a county-level city in Yunnan Province, which is managed by Yuxi City. Located in the middle of Yunnan Province, it borders Nanpanjiang River in the east, Jiangchuan District and Huaning County in the south, Chenggong District and Jinning District in the west and Yangzonghai in the north. Chengjiang city is located in the east of Yuxi city, which is close to Yuxi city and convenient for administration.

Chengjiang city was once a part of Yuxi city in history, with profound historical origins.