Legal basis:
Article 29 of the Criminal Procedure Law of People's Republic of China (PRC), judges, prosecutors and investigators shall withdraw in any of the following circumstances, and the parties and their legal representatives also have the right to ask them to withdraw:
(1) Being a party to the case or a close relative of the party;
(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.