Legal analysis: in the investigation stage, this period is usually two months, but when the case meets certain conditions, the public security organ will usually ask the superior procuratorate or the provincial procuratorate for approval to extend the investigation detention period, which can be extended by one to two months at a time, usually the longest investigation detention period is seven months. The stage of examination and prosecution is generally one month, which can be extended by half a month at most, but it can be returned to supplementary investigation twice at most, and the trial limit will be recalculated after withdrawal. The probation period is usually two months, which can be extended for up to four months. Therefore, judging from the time limit of handling a case in three stages, a criminal case generally takes about five months, and the longest time in three stages can reach 18 and a half months.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Article 85 When a public security organ detains a person, it must produce a detention permit. After detention, the detained person shall be immediately sent to the detention center for custody, and shall not exceed twenty-four hours. Unless it is impossible to notify or the notification of suspected crimes endangering national security or terrorist activities may hinder the investigation, the family members of the detained person shall be notified within 24 hours after detention. After the circumstances that hinder the investigation disappear, the family members of the detained person shall be notified immediately.

Article 86 The public security organ shall interrogate the detained person within 24 hours after detention. If it is found that it should not be detained, it must be released immediately and a release certificate will be issued.

Article 225 of the Criminal Law of People's Republic of China (PRC), in violation of state regulations, commits one of the following illegal business operations, disrupting market order, and if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times his illegal income or his property shall be confiscated: (1) dealing in franchise, monopoly goods or other commodities whose business is restricted by laws and administrative regulations without permission; (2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations; (three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business; (four) other illegal business activities that seriously disrupt the market order.