Legal basis: Article 174 of the Criminal Procedure Law of the People's Republic of China. If a criminal suspect voluntarily pleads guilty and agrees to the application of sentencing recommendations and procedures, he shall sign a confession and repentance letter in the presence of a defender or duty lawyer. If a criminal suspect pleads guilty and accepts punishment, there is no need to sign a confession and punishment statement under any of the following circumstances: (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 repentance is not required.