Tonghua (Chinese: 通化; pinyin: Tōnghuà) is a prefecture-level city in the south of Jilin province, People's Republic of China. It borders North Korea's Chagang Province to the south and southeast, Baishan to the east, Jilin City to the north, Liaoyuan to the northwest, and Liaoning province to the west and southwest. Its population was 1,812,114 registered residents at the 2020 census living in an area of 15,195 square kilometres (5,867 sq mi). its built-up (or metro) area made of the two urban districts was home to 446,917 inhabitants. It is known as one of the five medicine production centres in China.