according to
Ministry of Public Security
Procedures for handling criminal cases by public security organs
Decree number. Ministry of Public Security 127
Article 205 The questioning of witnesses and victims may be conducted on the spot, at the unit or residence where the witnesses and victims are located, or at the place proposed by the witnesses and victims. When necessary, witnesses and victims may be notified to testify in public security organs.
The questioning of witnesses and victims should be conducted separately.
When questioning witnesses and victims at the scene, investigators shall show their work certificates. Inquiries at the unit or residence of the witness or the victim or at the place proposed by the witness or the victim shall be approved by the person in charge of the case-handling department and a notice of inquiry shall be made. Before the inquiry, the investigator shall produce the inquiry notice and work certificate.
Article 212 In order to determine certain characteristics, injuries or physiological conditions of victims and criminal suspects, people may be examined, fingerprint information may be extracted, and biological samples such as blood and urine may be collected. If the victim dies, the identity of the victim shall be determined by means of identification of the victim's close relatives and biological examination.
If a criminal suspect refuses to inspect, extract or collect, if necessary, with the approval of the person in charge of the case-handling department, the investigators may force the inspection, extraction and collection.
Women's physical examination should be conducted by female staff or doctors.
The inspection records shall be signed by the investigators, inspectors, inspected personnel and witnesses who participated in the inspection. If the inspected refuses to sign, the investigator shall indicate it in the record.