Based on an analysis of key physical features, political prison camp (kwan-li-so) no. 25, established around 1968, remains an operational prison. The prison camp is well maintained by North Korean standards. The estimated population, based on imagery analysis of the compound, is between 2,500 and 5,000 prisoners. The prison camp's forced labor activity consists of a combination of agricultural production and light industrial manufacturing, such as bicycles and wood products.
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