Who are the people locked up in Shuanghe Farm?

Shuanghe Farm holds prisoners who have been reformed through labor. According to the query of relevant information, Beijing Shuanghe Farm (now Beijing Shuanghe Labor Camp, originally two brands and one set of men and horses) is affiliated to the Beijing Labor Education Administration (now Beijing Education and Correction Bureau), and the area is An "enclave" of Beijing City in Heilongjiang Province (land allocated by the government, the land use rights belong to Shuanghe Farm, but the land ownership rights are still owned by the territorial government). It is a special land used to strengthen the security of the capital and undertake the functions of labor education. It is located in Qiqihar It is at the junction of Meiris District and Gannan County.