According to China's "Supervision Law", the period for supervisory organs to take lien measures is generally three months. If the circumstances are serious, you can apply for an extension for a maximum of three months.

Relevant laws and regulations

People's Republic of China (PRC) supervision law

Article 43? Where a supervisory organ below the provincial level takes lien measures, it shall be decided by the collective leadership of the supervisory organ and reported to the supervisory organ at the next higher level for approval. When the provincial supervisory organ decides to take lien measures, it shall report to the supervisory committee of the People's Republic of China and the supervisory committee of China for the record. After taking the lien measures, unless the investigation is hindered, the unit or family members of the detained person shall be notified within 24 hours.

When the supervisory organ takes lien measures, it may request the public security organ to cooperate according to the needs of the work. The public security organ shall provide assistance according to law.

The supervisory organ shall ensure the food and rest of the detainees and provide medical services. Interrogation of a detained person shall reasonably arrange the time and duration of interrogation, and the interrogation record shall be read and signed by the interrogated person.

The detention period shall not exceed three months. Under special circumstances, the supervisory organ that decides to take lien measures shall report to the supervisory organ at the next higher level for approval, which may be extended once, and the extension time shall not exceed three months.

If a detainee is transferred to a judicial organ for suspected crime and sentenced to public surveillance, criminal detention or fixed-term imprisonment according to law, the detention period shall be reduced to fixed-term imprisonment. One day of detention counts as two days of public surveillance, and one day of criminal detention and fixed-term imprisonment.

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