As long as you are admitted to the prison department, you have to take pre-job training. If you graduated from a police academy, the training time is 1 month. If you graduated from other institutions, the general training time is 3 months.

The content of the training is basically related to prison management. Of course, you should take part in military training, which is the minimum quality, and then learn some laws and regulations. However, there are not many opportunities for these theoretical knowledge to be used after working in prison. You'd better learn some people skills and psychology.