Longjing is a city in Yanbian Korean Autonomous Prefecture, southeastern Jilin province, Northeast China. It lies on the Tumen River opposite the North Korean city Hoeryong.
Its population is approximately 258,000. It borders Yanji and Tumen City on the northeast, Helong to the southwest, and Antu County in the southwest. The border length is 142.5 kilometres (88.5 mi).
Yun Dong-ju studied in Longjing.
Longjing has two subdistricts, six towns and two townships: