According to the results of investigation and verification fed back by public security organs, prisons should reward those who report meritorious deeds in time, praise those who confess their crimes, and publicize them widely among criminals, further urging other criminals to continue to report criminal cases frankly and expand the results of "strike hard". Prisons should further adopt various ways to encourage criminals to surrender and report other people's criminal activities. As for the clues given by criminals, we should know the facts of the crime, the people involved, the time and place of committing the crime and other information and clues in detail as much as possible, and transfer them to the relevant public security organs in time. If criminals are not satisfied with the verdict, they can lodge a complaint. A prison shall promptly transmit the complaint materials of prisoners to the people's courts or people's procuratorates, and the prison shall promptly investigate and handle them, or transmit the complaint materials written by prisoners to the relevant authorities for handling. The prison shall be handed over in time and shall not be detained. A prison shall set up a special mailbox to receive the criminal's complaint, accusation and complaint materials, and designate a special person to open it and be responsible for handling it. If a criminal complains during the execution of a penalty, his right to complain should be protected according to law, and he can't think that he doesn't plead guilty or repent of his complaint without analysis.