Legal basis: Provisions on Procedures of Public Security Organs Handling Criminal Cases
Article 128 A detained person shall be interrogated within 24 hours after detention. If it is found that it should not be detained, it shall be approved by the person in charge of the public security organ at or above the county level, and a release notice shall be made. The detention center shall issue a release certificate to the detainee according to the release notice and release it immediately.
Article 129 If it is considered necessary to arrest a detained criminal suspect after examination, it shall be reported to the people's procuratorate for examination and approval within three days after detention. Under special circumstances, with the approval of the person in charge of the public security organ at or above the county level, the time for submitting an arrest for examination and approval may be extended by one to four days.