Yanji (Korean pronunciation: [jʌnɡil]), is the seat of the Yanbian Korean Autonomous Prefecture, in eastern Jilin province, People's Republic of China. Its population is approximately 400,000 of which a large section is ethnic Korean. Yanji is a busy hub of transport and trade between China and North Korea.
Yanji and its environs were largely unpopulated until the 1800s when Qing dynasty rulers of China began to encourage migration there, as an effort to stem encroaching Russian expansion.
Yanji is now part of the Yanbian Korean Autonomous Prefecture which is situated in the most easterly part of Jilin. Yanji City is centrally located, surrounded by five other county-level cities and two rural counties (see map); it is the administrative seat of the prefecture.