What is the name of Duyun prison in Guizhou?

Tongzhou prison, Guizhou province. According to official website of Guizhou Prison Administration, Tongzhou Prison in Guizhou Province is located in Tongzhou, the capital of Buyi and Miao Autonomous Prefecture in southern Guizhou, covering an area of 376.2 mu. The prison was founded in 196 1 year, formerly known as Duyun prison in Guizhou province, and renamed as "Tongzhou prison in Guizhou province" in 1995.