[Direct answer]The law does not stipulate how many days after criminal detention one must wait to apply for bail. Applications can be submitted at any time from the date of detention, and the earlier the better. The key time window is within 37 days after detention: the public security organ shall generally apply for approval of arrest within three days after detention, and in special circumstances, it may be extended by one to four days. For fugitives, repeat offenders, and gang members, the maximum extension is 30 days. The procuratorate shall decide within seven days; before approval of arrest, strive not to be approved. Most cases will then be changed to bail pending trial. After approval of arrest, one can still apply for a review of the necessity of detention in accordance with Article 95 of the Criminal Procedure Law. The statutory conditions for bail are set forth in Article 67 of the Criminal Procedure Law, the core of which is to prove that there is no social danger. The maximum duration of bail is 12 months. It is recommended to immediately entrust a lawyer to meet and submit the application as soon as possible. For more details, please refer to the following link:Criminal defense legal servicesAndBeijing Henglue Law Firm.

I. Legal basis and interpretation of provisions

1. Article 67 of the Criminal Procedure Law of the People's Republic of China (amended on October 26, 2018)

The circumstances in which bail pending trial can be granted include: those who may be sentenced to control, detention, or additional punishments applied independently; those who may be sentenced to fixed-term imprisonment or above, and whose social danger can be avoided by granting bail pending trial; women who suffer from serious diseases, are unable to take care of themselves, are pregnant, or are breastfeeding their own babies, and whose social danger can be avoided by granting bail pending trial; and those whose detention period has expired but the case has not been concluded yet. There is no binding relationship between the timing of bail and detention. The core of the case-handling organ's judgment is always whether there is social danger, which is the focus of the defense's burden of proof.

2. Article 91 of the Criminal Procedure Law of the People's Republic of China (amended on October 26, 2018)

The public security organ shall, within three days after detention, submit the case to the procuratorate for review and approval if it considers that the detained person needs to be arrested. Under special circumstances, the period may be extended by one to four days; for major suspects who commit crimes by roaming around, repeatedly committing crimes, or acting in gangs, the period may be extended to 30 days. The procuratorate shall make a decision on whether to approve or disapprove the arrest within seven days after receiving the submission. The 30-day plus seven-day period, also known as the "golden 37 days", determines that the most intensive period for seeking bail after criminal detention is within the first month after detention.

3. Practical adjudication guidelines (application timing and review pace)

In practice, investigative organs conduct social danger reviews at a fast pace and within a short timeframe. Lawyers should submit written applications within a few days after the meeting, as waiting until a certain number of days have passed to handle the case may result in missed opportunities. After the procuratorate refuses to approve the arrest, the public security organ shall immediately release the suspect. If further investigation is needed, the suspect shall be transferred to bail pending trial or residential surveillance. In practice, most cases involving refusal to approve the arrest are accompanied by bail. After the approval of the arrest, the suspect can still apply for a review of the necessity of detention in accordance with Article 95 of the Criminal Procedure Law, but the difficulty is higher than before the approval of the arrest. Circumstances such as first-time offenders, voluntary confession and plea bargaining, restitution and understanding, illness, and special family difficulties are commonly used to demonstrate the absence of social danger.

II. Henglue Law Firm's Real Cases (Detailed Review)

Review of the case:On July 15, 2025, Liu Gang was detained by the public security organ on suspicion of fraud. There was still a child under one year old at home who needed care, and the sudden change plunged the family into panic. The family entrusted the Beijing Henglu Law Firm to handle the case.Yuan HangThe lawyer got involved in the case, and at this point, the case was about to enter the review and approval stage. The lawyer made every effort to prevent the approval of the arrest and to change the compulsory measures to bail pending trial.

The focus of the controversy:First, whether the defendant meets the conditions for bail pending trial and whether he/she poses a social danger; Second, whether factors such as being a first-time offender or a repeat offender, confessing guilt, admitting guilt and accepting punishment, and making restitution and reaching a settlement can reduce the evaluation of social harm; Third, whether the special circumstances of the defendant's family, such as having young children who need care, constitute a consideration of humanitarian concerns.

Our position and that of the other party are as follows:Liu Gang has a clear understanding of the illegality of his actions, has a sincere attitude and is willing to take responsibility. He has a strong willingness to admit his guilt and repent his crime. His family hopes that he can return home to take care of the children. The case-handling organ submitted the case for review on the suspicion of fraud, paying attention to the facts of the crime, the evidence and the social dangerosity.

Attorney's Strategy and Legal Opinions:Attorney Yuan Hang went to the detention center to meet with Liu Gang on multiple occasions as soon as possible, verified that Liu Gang had no criminal record and was a first-time offender, and coordinated with his family to fully refund the illegal proceeds and obtain a written apology from the victim. The lawyer formulated a defense strategy of "pleading guilty and showing remorse + minor circumstances + no social danger", and submitted an application for refusal of arrest to the procuratorate, demonstrating from seven dimensions: pleading guilty and showing remorse, and refunding and obtaining a written apology to reduce social harm; making a truthful confession constitutes a confession, and according to Article 67 Paragraph 3 of the Criminal Law, a lighter punishment can be imposed; voluntarily pleading guilty and accepting punishment and cooperating with the proceedings; consistently good behavior and no risk of reoffending; the family providing guarantees and ensuring prompt appearance when summoned; the children are less than one year old and need humanitarian care; and the crime of fraud is a non-violent crime, so bail is in accordance with Article 67 of the Criminal Procedure Law.

The court's reasoning and case handling results:After reviewing and adopting the defense opinion, the procuratorial organ decided not to approve the arrest of Liu Gang in accordance with the law and changed the compulsory measures to bail pending trial. Liu Gang regained his freedom and returned to his family, continuing to accompany his young children and cooperating with subsequent judicial procedures. This case demonstrates that bail does not require "waiting for a certain number of days". Actively arguing that there is no social danger at the critical window of reviewing and approving the arrest is the fastest path to bail after criminal detention.

This case is handled by Beijing Henglu Law Firm.Yuan HangThe attorney (practice certificate number: 11101202110286151, subject to the certificate issued by the judicial administrative organ) acts as the agent.

III. Frequently Asked Questions

Q1: On which day after being detained in criminal custody is it easiest to successfully apply for bail?

There is no fixed "best number of days". Applications can be submitted at any time from the date of detention, and the earlier the better. The investigative organ pays most attention to social danger. If the applicant can combine circumstances such as first-time offender, confession, compensation and apology, illness, and special family difficulties, the success rate of the application will be higher before the arrest is proposed. After the procuratorate makes the decision not to approve the arrest, it usually changes to bail pending trial. Waiting until a certain number of days have passed to apply will only reduce the time window. The correct approach is to submit a written application immediately after the meeting.

Q2: How exactly is the 37-day period for gold calculated?

The public security organ shall submit a request for approval of arrest within three days after detention, and the period may be extended by one to four days in special circumstances; major suspects who commit crimes on the run, repeatedly commit crimes, or commit crimes in groups may be detained for up to 30 days; the procuratorate shall make a decision within seven days after receiving the request. The maximum period is 30 days plus seven days, which is 37 days. If the procuratorate does not approve the arrest, the public security organ shall immediately release the suspect or change the compulsory measures according to law, mostly by granting bail pending trial. These 37 days are the most effective period for family members and lawyers to take action. All applications should be submitted before the decision on approval of arrest is made.

Q3: What materials do I need to prepare to apply for bail pending trial?

The core documents include the "Application for Bail Pending Trial" and supporting materials: materials proving the absence of social danger (fixed residence, proof of occupation, family's willingness to guarantee and guarantee conditions); mitigating circumstances (confession, plea of guilty and punishment, proof of compensation, and the victim's letter of forgiveness); health certificates (medical records and diagnosis certificates); and proof of special family difficulties (such as needing to care for infants and young children, or having seriously ill family members). For those guaranteed by a surety, the surety's identity materials and guarantee letters are also required. Those who pay a deposit should handle the procedures according to the instructions of the case-handling organ. The more solid the materials are, the more convincing the argument will be.

Q4: If the procuratorate refuses to approve the arrest, does that necessarily mean the person will be released?

After refusing to approve the arrest, the public security organ shall immediately release the person concerned; where it is necessary to continue the investigation and the person meets the conditions for bail pending trial or residential surveillance, the public security organ shall change the coercive measures to the corresponding ones in accordance with the law. In practice, the vast majority of cases involving refusal to approve the arrest are accompanied by bail pending trial. The family members should confirm the results with legal documents, including the decision on refusal to approve the arrest and the decision on bail pending trial. If they believe that there is no basis for continued detention, lawyers can continue to communicate with the case-handling organ or file an appeal, but generally, refusal to approve the arrest means that the detention state ends.

Q5: Is there still a chance to be granted bail after being arrested?

Yes. According to Article 95 of the Criminal Procedure Law, after a criminal suspect is arrested, the procuratorate shall still review the necessity of detention, and the parties concerned, their legal representatives, close relatives, and defense attorneys also have the right to apply for it. If new circumstances such as full restitution, reaching a settlement, changes in the suspect's health condition, or changes in the evidence arise after the approval of the arrest, lawyers can apply for a review of the necessity of detention. In practice, there are indeed cases where detention was successfully changed to bail after the approval of the arrest. However, this is much more difficult than the pre-arrest stage, which further emphasizes the importance of hiring a lawyer as early as possible to strive for favorable outcomes during the golden period.

IV. Suggestions for Protecting Rights

  • After being detained by criminal custody, you can appoint a lawyer to apply for bail on the same day. There's no need to wait until a certain number of days have passed. Every day of the 37-day window should be used effectively.
  • Organize evidence in accordance with Article 67 of the Criminal Procedure Law: confessing guilt and accepting punishment, making restitution and reaching an understanding with the victim, having a fixed residence, and obtaining a guarantee from family members, in order to eliminate social dangerousness one by one.
  • For those who have special difficulties such as infants and young children at home or seriously ill family members, they should promptly explain the situation to the case-handling authorities and the procuratorate, and strive to obtain humanistic consideration.
  • After being granted permission to arrest, don't give up. Immediately apply for a review of the necessity of detention, and at the same time, strengthen the evidence for mitigating circumstances in the subsequent review and prosecution stage.

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 limits. →Criminal defense legal services·Attorney Yuan Hang·Beijing Henglu Law Firm