| Yanjin County | |
| Mapsize: | 250px |
| Coordinates: | 28.109°N 104.234°W |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Yunnan |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Zhaotong |
| Area Total Km2: | 1416 |
| Population Total: | 453096 |
| Population Density Km2: | auto |
| Timezone: | CST |
| Utc Offset: | +8 |
| Postal Code Type: | Postal code |
| Postal Code: | 657500 |
| Area Code: | 0870 |
Yanjin County 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[1] valley, a tributary of the Yangtze, the town of Yanjing, Yanjin's county seat, has been referred to as the "World's Narrowest City."[2] [3] The buildings of the city are situated on tall pillars, which is a preemptive measure toward water-level rise during periods of heavy flooding.[4] Videos of the city routinely go viral because of its uniqueness and the surrounding natural environment, attracting much attention to the city.
Since at least the Qin Dynasty (221–206 BCE), the area of Yanjin was home to the Bo people.[5]
During a Duanwu Festival celebration in the late 1800s or early 1900s at Yanjin, a bridge that spanned the Heng River collapsed and four hundred people were drowned.[6] This led to the bridge being rebuilt with walls and a roof. The county was named after the city of Yanjin when it was formed in 1917.
In July 2006, a 5.1 magnitude earthquake left 22 dead, 106 injured and more than 6,000 homes demolished.[7]
In 2021, management practices to institute an urban rain flood ecosystem were underway in Yanjin through use of the sponge city approach to prepare for high flooding.[8]
Yanjin County has 6 towns and 4 townships.[9]
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