Sansui County is a county in eastern Guizhou province, China, bordering Hunan province to the east. It is under the administration of the Qiandongnan Miao and Dong Autonomous Prefecture and is one of the province's eastern gateways.

Administrative divisions

Sansui County is divided into seven towns and two townships:

Towns

Townships

Geography and climate

Sansui County is located in the east of Guizhou and the northeast of Qiandongnan Prefecture 247 km away from the provincial capital of Guiyang and 87 km away from the prefecture seat of Kaili. It ranges in latitude from 26° 47' to 27° 04' N and in longitude from 108° 32' to 109° 04' E, spanning a total area of 1035.8 km2. Bordering counties are Xinhuang (Hunan) to the northeast, Tianzhu and Jianhe to the southeast and southwest, and Zhenyuan to the north. The county is part of the Yuan River watershed, and there is a total of 776 km of rivers within its borders. Sansui has a monsoon-influenced humid subtropical climate (Köppen Cfa), with chilly, damp winters, and hot, humid summers. The monthly daily average temperature ranges from 3.9 °C in January to 25.5 °C in July, while the annual mean is 15.4 °C. More than half of the annual rainfall occurs from May to August, while the annual frost-free period typically lasts 290 to 300 days.

Transportation

The county has one railway station, Sansui railway station. The Three Arch Bridge (Longting Bridge) collapsed on 8 August 2024.