Legal analysis: If a criminal suspect voluntarily pleads guilty and accepts punishment, he should sign a confession of guilt and punishment in the presence of a defender or duty lawyer.

Legal basis: "Criminal Procedure Rules of the People's Procuratorate"

Article 272: If a criminal suspect voluntarily pleads guilty and accepts punishment, and agrees to the sentencing recommendations and application of procedures, he shall be informed by the defender or Sign a confession of guilt and punishment in the presence of the duty lawyer. The recognizance letter shall include the criminal suspect's truthful confession of the crime, agreement with the sentencing recommendations and application of procedures, etc., and shall be signed by the criminal suspect, his defender, and the duty lawyer. If a criminal suspect has any of the following circumstances, he does not need to sign a confession and punishment statement: (1) The criminal suspect is blind, deaf, mute, or a mental patient who has not completely lost the ability to recognize or control his own behavior; (2) ) The legal representative or defender of a minor criminal suspect has objections to the minor’s confession and punishment; (3) Other situations where signing a confession of guilt and punishment is not required. Under the circumstances mentioned in the preceding paragraph, if the criminal suspect fails to sign a confession of guilt and punishment, the application of the leniency system for confession and punishment shall not be affected.