Criminal detention without arrest warrant for 47 days.

Legal analysis: 40 days without arrest warrant, and the longest detention is 37 days. If no arrest is made during this period, compulsory measures will be changed or people will be released. Most of the arrest notices are in the form of letters, and it will take several days for family members to receive them.

Legal basis: Article 89 of the Criminal Procedure Law of People's Republic of China (PRC) stipulates that if the public security organ deems it necessary to arrest a 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 criminal suspects who commit crimes on the run, commit crimes repeatedly or commit crimes in partnership, the time for reporting 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.