Criminal Procedure Law of the People's Republic of China
Article 87
When the public security organ requests the arrest of a criminal suspect, it shall write a letter of approval of the arrest, together with the case file and evidence, and transfer it to the people's procuratorate at the same level for examination and approval. When necessary, the people's procuratorate may send people to participate in the discussion of major cases by public security organs.
Article 88
After the people's procuratorate has examined and approved the arrest, it may interrogate the criminal suspect; In any of the following circumstances, the criminal suspect shall be interrogated:
(1) Having doubts about whether the conditions for arrest are met;
(2) The criminal suspect requests to make a face-to-face statement to the procurator;
(3) There may be major illegal acts in the investigation activities. When examining and approving an arrest, the people's procuratorate may question witnesses and other participants in the proceedings and listen to the opinions of defense lawyers; If a defense lawyer makes a request, he shall listen to the opinions of the defense lawyer.