What Yining Prison in Yunnan Province needs to do is as follows. The work done by prisoners in prison is mainly intensive manual labor, and all kinds of factories, mines, aquaculture and agricultural planting are basically coolies. Prisoners work in many labor-intensive processing factories such as clothing, paradise umbrellas, luggage, football and knitting. Cement, rubber, bearings, castings, machinery, etc. In northwest land reclamation, it is generally required to plant land and vegetables for 8 hours a day, but if the labor task is not completed, prisoners will have to work overtime to consume their physical strength, hone their minds, eliminate their ambitions and turn over a new leaf. Besides work, prisoners also have rest time. When they don't need to work, they can do all kinds of leisure activities, such as playing basketball, reading books and learning knowledge, so they can also study in prison and even take exams and get certificates. Many prisoners will reduce their prison time because they have made some outstanding contributions in prison. For example, lengthen working hours, increase workload, and learn all kinds of knowledge to get a certificate.