Sandu Shui Autonomous County

Sandu Shui Autonomous County (Chinese: 三都水族自治县; pinyin: Sāndū Shuǐzú Zìzhìxiàn; Bouyei: Sanyduy Suijzuf Ziqziqxianq) is an autonomous county in the southeast of Guizhou province, China. It is under the administration of the Qiannan Buyei and Miao Autonomous Prefecture, and the only Shui Autonomous County in China; 63% of Shui in China live in this county, which is the heartland of the Shui people. Per a 2022 county government publication, Sandu has a population of 381,000, 97% of whom belong to ethnic minorities, and 67% of the total population are Shui.

It is one of the poorest counties of Guizhou. Most of the county is forested and it is noted for its clean air.