Legal basis: Article 29 of the Criminal Procedure Law of People's Republic of China (PRC) stipulates that judges, prosecutors and investigators should withdraw in any of the following circumstances, and the parties and their legal representatives also have the right to ask them to withdraw: (1) They are parties to the case or close relatives of the parties; (2) He or his close relatives have an interest in the case; (3) Having served as a witness, expert witness, defender or agent ad litem in this case; (4) Having other relations with the parties to the case, which may affect the fair handling of the case.