Tumen City Port. Tumen City is located in the east of Jilin Province, the east of Changbai Mountains, the lower reaches of the Tumen River, across the river from Wencheng County, North Korea's Xianjing Road, adjacent to Hunchun City in the east, connected to Yanji City in the west, and Longjing City in the south. It is a multi-ethnic city with Korean ethnicity.