Article 199 of the Procedures for Handling Criminal Cases by Public Security Organs stipulates that: in order to determine the cause of death, with the approval of the person in charge of the public security organ at or above the county level, the corpse may be dissected or opened for inspection, and the family members of the deceased shall be notified to be present and the autopsy notice shall be signed or sealed. If the family of the deceased refuses to be present or refuses to sign or seal without justifiable reasons, it will not affect the autopsy or coffin opening inspection, but it shall be indicated in the notice of autopsy. For unidentified bodies, if it is impossible to inform the families of the deceased, it shall be noted in the record.