According to the situation, the time for filing a case for investigation is different, usually 7 working days. "Procedures for Public Security Organs to Handle Criminal Cases" Article 166 A public security organ shall immediately accept a citizen's kidnapping, report, complaint, report or the surrender of a criminal suspect, ask about the situation, and make a record, which shall be signed by the kidnapper, the informant, the accuser, the informant and the surrender. When necessary, audio or video recordings shall be made.