Legal analysis: Yes, most prisons have sub-wards, and new prisoners have to go through three months' education before taking the exam. Those who pass the examination will be issued with reform cards and then diverted to other prisons. In some places, there are special prisons for entrance education, and then they will be diverted to other prisons.

Legal basis: People's Republic of China (PRC) Prison Law.

Article 3 A prison shall implement the principle of combining punishment with reform and combining education with labor, and transform criminals into law-abiding citizens.

Article 4 A prison shall supervise prisoners according to law, organize prisoners to participate in productive labor and provide ideological, cultural and technical education to prisoners according to the needs of reforming prisoners.