1. The appeal of the parties, their legal representatives and close relatives shall meet the following conditions:
Article 204th of the Criminal Procedure Law stipulates that the people's court shall retry the appeal of the parties, their legal representatives and close relatives if it meets one of the following circumstances:
(a) there is new evidence to prove that the facts identified in the original judgment or ruling are indeed wrong;
(2) The evidence on which conviction and sentencing are based is not true or sufficient, or there are contradictions between the main evidences proving the facts of the case;
(3) The application of the law in the original judgment or ruling is indeed wrong;
(4) The judicial officers commit acts of corruption, bribery, favoritism and malpractice, and perverting the law.
2. Conditions for courts and procuratorates at all levels to start trial supervision procedures:
Article 205 of the Criminal Procedure Law stipulates that presidents of people's courts at all levels must submit legally effective judgments and rulings of their own courts to the judicial committee for handling if they find errors in ascertaining facts or applying laws.
The Supreme People's Court has the right to send back or instruct the people's courts at lower levels to retry the legally effective judgments and rulings of the people's courts at all levels. If the people's courts at higher levels find that there are indeed mistakes, they have the right to send back or instruct the people's courts at lower levels to retry.
The Supreme People's Procuratorate has the right to lodge a protest with the people's court at the same level in accordance with the procedure of trial supervision if it finds that the legally effective judgment or ruling of the people's court at all levels is wrong, and the people's procuratorate at a higher level has the right to lodge a protest with the people's court at the same level in accordance with the procedure of trial supervision.
When a people's procuratorate protests a case, the people's court that accepts the protest shall form a collegiate bench for retrial. If the facts of the original judgment are unclear or the evidence is insufficient, the people's court at a lower level may be ordered to retry.
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The above is the answer to what is the criminal retrial procedure and the conditions for criminal retrial. It can be seen that in order to ensure the stability of court decisions, the conditions for appealing and initiating criminal retrial procedures are extremely strict. Therefore, it is suggested that the parties should be prepared to provide relevant evidence before the appeal, and if necessary, it is best to entrust a lawyer in criminal law for consultation.