The Jin River, also known by its Chinese name Jin Jiang, is located in southern Fujian. Its basin includes most of Quanzhou prefecture-level city, whose Jinjiang County is named after it.
The name of the river comes from 3rd-to-5th-century Jin Empire, during which time its banks were settled by Chinese colonists from the Central Plains.
The upper course of the Jin is also known as the Xixi (西溪, "West Creek"). It originates in the Daiyun Mountains (戴云山) and flows generally southeast for 180 kilometers (110 mi) into Quanzhou Bay on the Taiwan Strait. East of Nan'an, the Xixi receives its major tributary, the Dongxi (东溪, "East Creek"), from the north. The Jin River develops an estuary as it enters Quanzhou Bay from the west. There, it separates downtown Quanzhou to the north from Jinjiang to its south.
There are 13 towns around the river: Chinyan, Chidian, Chendai, Luoshan, Cizao, Neikeng, Anhai, Dongshi, Yonghe, Yinglin, Longhu, Shenhu and Jinjinchu. Zimao Mountain is also nearby.
The annual rain fall level ranges from 820 to 2,276 millimeters (32.3 to 89.6 in), so the Jin River sees dramatic changes in volume during the year.