In fact, the confession said by the parties should be a simple oral investigation, because if a formal interrogation record is made, it should be checked by the interrogated person, and if he can't read it, read it to him. If there are omissions or errors in the record, the interviewee can supplement or correct them. After the person questioned admits that there is no mistake in the transcript, he shall sign or seal it. Investigators should also sign the records. If the person being interrogated asks to write a confession himself, it shall be allowed. When necessary, investigators may also ask the interrogated person to write a confession in person.

According to the Criminal Procedure Law of People's Republic of China (PRC)

Article 120 The interrogation record shall be checked by the criminal suspect, and read to him if he is unable to read. If there are omissions or errors in the record, the criminal suspect may make additions or corrections. The criminal suspect shall sign or seal his name after admitting that it is correct in the record. Investigators should also sign the records. If a criminal suspect requests to write his own confession, it shall be allowed. When necessary, investigators may also ask the criminal suspect to write a confession in person.

121st investigators may record or video the interrogation process when interrogating a criminal suspect. For cases that may be sentenced to life imprisonment or death penalty or other major criminal cases, the interrogation process shall be recorded or videotaped.

Audio or video recording should run through the whole process and remain intact.

Article 122 Investigators may question witnesses on the spot, or go to the place where the witness is located or the place where the witness puts forward. When necessary, the witness may be notified to testify in a people's procuratorate or a public security organ. When questioning witnesses on the spot, they should show their work certificates, and when questioning witnesses at their units, residences or places proposed by witnesses, they should show their certificates from people's procuratorates or public security organs.

The questioning of witnesses should be conducted separately.

Article 123 When questioning a witness, the witness shall be informed of the legal responsibilities that he shall truthfully provide evidence and testimony and intentionally commit perjury or conceal criminal evidence.

Article 124 The provisions of Article 120 of this Law shall also apply to the questioning of witnesses.