The fourth factory

(The fourth factory)
(picture source：photo by this team)

　　A smaller factory that produces metal products. Farm: divided into internal and external farming, the purpose of which was to allow prisoners with shorter terms to work; when external farming, it required two or three people to be shackled together to prevent them from escaping. Produce from the farms were very abundant, such as yams, pineapples, tomatoes, and other foods. Other than internal consumption of in the prison, the rest could be sold to the outside, so the funds could be used to buy other types of food.

(The fourth factory.)
(picture source：photo by this team)