Yanjin County, Yunnan

Yanjin County (simplified Chinese: 盐津县; traditional Chinese: 鹽津縣; pinyin: Yánjīn Xiàn) is located in the northeast of Yunnan Province, China, bordering Sichuan Province to the north and east. It is under the administration of the prefecture-level city of Zhaotong.

Situated on the banks of the narrow Heng River valley, a tributary of the Yangtze, the town of Yanjing, Yanjin's county seat, has been referred to as the "World's Narrowest City." The buildings of the city are situated on tall pillars, which is a preemptive measure toward water-level rise during periods of heavy flooding. Videos of the city routinely go viral because of its uniqueness and the surrounding natural environment, attracting much attention to the city.

The city is within the valley, along with a highway and a railway but does not have a high-speed train.

Daily slow train service 5635/5636 between Neijiang 内江 and Zhaotong 昭通 passes through Yanjin 盐津 and Yanjingbei 盐津北 (Yanjin North) stations. Neijiang is pretty close to Chengdu. Yanjinbei Station is closer to the city center.