Tianchang, Anhui Province, is a county-level city in Anhui Province. Being surrounded by Jiangsu Province and close to Nanjing and Yangzhou, Tianchang has always been economically more developed than other parts of Anhui Province. Wetland Park was originally a depression covered with reed-like plants, red grass, so it was formerly called Red Cao Lake. In recent years, it is said that the Tianchang Municipal People's Government has adopted the policy of land for development and sold some land to developers at a low price. The developers have transformed the depression into a wetland park free of charge.