Sanjiang Dong Autonomous County (simplified Chinese: 三江侗族自治县; traditional Chinese: 三江侗族自治縣; pinyin: Sānjiāng Dòngzú Zìzhìxiàn; Standard Zhuang: Sanhgyangh Dungcuz Swciyen; Southern Dong: Saml Nyal Dongl Zuc Zil Zil Yenh[4]) is under the administration of Liuzhou, Guangxi Zhuang Autonomous Region, China.

It is a region traditionally inhabited by the Dong people, bordering the prefecture-level divisions of Qiandongnan (Guizhou) to the north, Huaihua (Hunan) to the northeast and Guilin to the west.

[5] Sanjiang County is divided into 6 towns, 6 townships and 3 ethnic townships:[6] 20 kilometres (12 mi) north of Sanjiang, toward Hunan province, lies the area of Dong people, Chengyang (程阳), which is a popular destination for backpacker tourism.

Crossing the river is the best preserved Wind and Rain Bridge (程阳风雨桥, chéng yáng fēng yǔ qiáo) which has five parts.

The bridge dates to 1912 and is for many people the main reason to visit the village.