Xiasi is a town located in the city of Kaili within China's Guizhou province. Established in 1931, the town covers a total area of 154 square kilometres and has a population of approximately 35,000 residents.
The region is home to native ethnic minorities, specifically the Miao and Mulao people. Historically, Xiasi served as a former administrative division of Majiang before it was officially changed to Kaili on September 25, 2014.