What does criminal detention mean for 30 days?

Criminal detention is a compulsory method for public security organs and people's procuratorates to temporarily deprive criminals or major suspects of their personal freedom in case of legal emergency during investigation. Detention is only a temporary measure for those who should be arrested and apply for approval of arrest. According to the provisions of the Criminal Procedure Law of People's Republic of China (PRC), the detention authority of public security organs is 3 days, which can be extended to 1 4 days under special circumstances, and can be extended to 30 days for fugitives, partners or multiple crimes. During this period, the public security organ shall report to the procuratorate for approval of the arrest, and the procuratorate shall make a decision on approval or disapproval within 7 days. The detainee will continue to be detained while waiting for the approval of the procuratorate. At this point, before the procuratorate decides whether to arrest, the maximum detention period is 37 days. It can be seen that the longest criminal detention is 30 days, and the longest arrest approved by the procuratorate is 37 days, and the shortest is less than 3 days. Therefore, criminal detention does not have to last for 30 days. Legal provisions: Article 91 of the Criminal Procedure Law of People's Republic of China (PRC). If the public security organ deems it necessary to arrest the detained person, it shall submit it to the people's procuratorate for examination and approval within three days after detention. Under special circumstances, the approval time can be extended by one to four days. For major suspects who commit crimes on the run, commit crimes many times or commit crimes in collusion, the time for submitting for examination and approval may be extended to 30 days. The people's procuratorate shall, within seven days after receiving the approval letter from the public security organ, make a decision on whether to approve or disapprove the arrest. If the people's procuratorate does not approve the arrest, the public security organ shall immediately release it after receiving the notice and promptly notify the people's procuratorate to execute it. Those who need to continue the investigation and meet the conditions of obtaining a guarantor pending trial or residential surveillance shall be granted a guarantor pending trial or residential surveillance according to law.