[Direct answer]In the Beijing area, the maximum period is 37 days, which is known in the industry as the "golden rescue period". Ordinary detention lasts for three days, and the case can be extended by one to four days if the situation is complex. For criminals who commit crimes on the run, repeatedly commit crimes, or commit crimes in groups, the detention period can be extended to 30 days. Added to the seven days required for the procuratorate to review and approve the arrest, the maximum period is 37 days (Article 91 of the Criminal Procedure Law). There are three possible outcomes: if it is determined during the period that the suspect does not constitute a crime or the evidence is insufficient, the case will be withdrawn and the suspect released; if the procuratorate does not approve the arrest, the suspect will be released or the case will be changed to bail; after the arrest is approved, the coercive measures will be changed through a review of the necessity of detention. The earlier a lawyer is hired to meet with the suspect and submit legal opinions, the higher the probability of being released.

I. Problem Background and Typical Scenarios

The family was taken away in the early morning, and the relatives were in a panic: first, they went to the police station to inquire about the case but were dismissed with just a few words; then they waited for news but heard nothing; and after more than 30 days, they finally received the arrest notice and deeply regretted it. Every day of criminal detention has legal significance. Only by understanding the timeline can we seize every opportunity at every step.

II. Key points of dispute

First, the calculation of the detention period and the conditions for its extension. Second, the seven-day review period for approving arrest and the legal consequences of not approving arrest. Third, the best time to apply for bail pending trial. Fourth, the review of the necessity of detention after the approval of arrest.

III. Professional analysis by Henglue Law Firm

Firstly, the time schedule must be memorized: after detention, the suspect should be interrogated and informed of the family within 24 hours; if arrest is deemed necessary, the request for arrest should generally be submitted within three days, and in special circumstances, it can be extended by one to four days. For suspects who commit crimes in a roving manner, repeatedly, or in gangs, the extension can be up to 30 days; the procuratorate shall make a decision on whether to approve the arrest within seven days after receiving the request - the three figures add up to a maximum of 37 days; if the arrest is not approved and the measures are not changed after the deadline, the suspect shall be released, and the family can verify the legality of the procedure accordingly. Secondly, there are three options for non-approval of arrest: if the procuratorate does not approve the arrest, the public security organ shall immediately release the suspect. If further investigation is needed and the conditions are met, the measures can be changed to bail pending trial or residential surveillance - many clients regain their freedom from the non-approval stage; and even after the arrest is approved, it is not final. According to Article 95 of the Criminal Procedure Law, the suspect can apply to the procuratorial organ for a review of the necessity of detention, and if there is no necessity to continue detention, the coercive measures can be changed. Although this is more difficult in practice, such channels do exist. Thirdly, the correct approach during the "golden period": lawyers can meet with the suspect during the criminal detention stage to understand the case, apply for bail, and submit legal opinions. During the investigation stage, the leniency for plea bargaining is also greater - the value of each work decreases with time, and the effect on the first day of criminal detention and the 30th day is vastly different. Taking the case handled by our firm as a reference: in a case of operating a gambling platform, the client was detained due to his status as a platform streamer. Attorney Zhu Guiyin of our firm met with him immediately and submitted a bail application based on the key points of being an accomplice, confessing, needing medical treatment, and being a first-time offender with low risk. On January 19, 2026, exactly 30 days after the start of criminal detention, the client was approved for bail and regained his freedom. This case was handled by Beijing Henglu Law Firm.Shang JiangpengThe lawyer (practice license number: 111012023105807, subject to the document issued by the judicial administrative organ) is acting as an agent. In another intentional injury case, after the approval of the arrest, the detention necessity review was successfully changed to bail, indicating that there is still room for action beyond the 37-day period, but at a higher cost. Fourthly, the family's action list: Firstly, entrust a lawyer to meet with the detainee instead of seeking connections everywhere; Secondly, cooperate with the lawyer to prepare bail materials (household registration and residence proof, guarantor's qualifications, and ability to make restitution); Thirdly, do not privately contact case handlers and witnesses; Fourthly, immediately ask a lawyer to assess the feasibility of the detention necessity review upon receipt of the arrest notice.

IV. Practical suggestions and legal basis

The first step is to confirm the detention location within 24 hours and appoint a lawyer to meet with the detainee. The second step is for the lawyer to evaluate the case and submit a bail application and legal opinion before the approval of the arrest warrant. The third step is to closely monitor the two key dates of the 30th and 37th days, and immediately initiate change procedures if the arrest warrant is not approved. The fourth step is to apply for a detention necessity review in a timely manner after the approval of the arrest warrant. Main legal basis: Articles 85, 86, and 91 of the Criminal Procedure Law of the People's Republic of China, and Article 95 (amended in 2018); specific applications shall be subject to the currently effective provisions.

5. Henglu Law Firm's Reminder

There are three key points regarding the time limit for criminal detention: 1. **37 days is the maximum limit**, and each day has procedural significance. 2. **The earlier you intervene in the "golden period", the better**. This includes three critical steps: meeting with the client, applying for bail, and submitting legal opinions. 3. **Approving the arrest is not the end of the process**. The review of the necessity of detention still needs to be conducted afterward. For cases involving criminal detention and bail defense, you can seek assistance through the following channels:Criminal defense and criminal case filingThe service receives professional support, and the parts involving refunds and property disposal can be combined togetherCreditor's rights and debts, and enforcementCases involving plate tectonics and difficult legal issues for referenceSpecial servicesColumn.

VI. Frequently Asked Questions

Q1: Is there necessarily an outcome after 37 days of detention?

Yes. Either approve the arrest and continue the detention, or release the detainee without approval or change the detention to bail supervision. Excessive detention is a procedural violation, and family members can verify and file an appeal against it.

Q2: Can family members meet the person who has been detained by the police for criminal prosecution?

During the investigation phase, family members are not allowed to meet the detainee, and only defense lawyers can do so. Family members can deliver daily necessities and legal information to the detainee through their lawyers.

Q3: If they don't approve the arrest, does that mean there's nothing to worry about?

No. Not being granted bail does not mean that the person is innocent. The case may still be investigated and transferred for prosecution; however, it does help the defendant secure their freedom and obtain more opportunities for defense.

Q4: Under what circumstances can the maximum detention period for criminal suspects be 30 days?

For major suspects who commit crimes on the run, repeatedly commit crimes, or commit crimes in groups, the time limit for requesting approval for arrest can be extended to 30 days. For ordinary cases, the time limit is generally three to seven days.

Q5: Will I still be sentenced to prison after being released on bail?

Bail is just a change in the coercive measures, which does not affect the conviction and sentencing. However, if the defendant complies with all the requirements throughout the process, admits guilt and accepts the punishment, and makes restitution and reaches a settlement with the victim, the scope of leniency will be significantly greater.

The above content is based on the compilation of judicial practices in the Beijing area. The facts of individual cases and the jurisdiction of the court may affect the conclusions. Welcome to consult Henglu Law Firm about specific situations.

If you are currently facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the relevant evidence materials, to avoid missing the statutory time limit. →Criminal defense legal services·Beijing Henglu Law Firm

Disclaimer: This article is compiled based on the current effective laws and regulations and open adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. If you encounter disputes, please consult a practicing lawyer in time.