Legal basis: People's Republic of China (PRC) Prison Law.
Article 47 A prisoner may correspond with others while serving his sentence, but his correspondence shall be subject to inspection by the prison. Letters found in prisons that hinder the reform of criminals may be detained. Letters written by criminals to higher authorities and prison judicial organs are not subject to inspection.
Article 48 While serving a sentence, a prisoner may meet with his relatives and guardians in accordance with regulations.
Article 49 A prisoner receiving property shall be approved and inspected by the prison.