According to China's laws, the Public Security Bureau cannot directly freeze personal bank accounts. If it is for handling cases or judicial needs, the Public Security Bureau needs to report to the court to freeze the relevant bank accounts involved. The court sent a letter to the bank, and the bank replied and signed it, freezing the account according to the regulations. The general freezing period is six months, which can be extended once as needed, usually for three to six months. After criminal detention, according to the needs of handling cases, banks will freeze their bank cards after receiving court letters.

Legal basis: Provisions on Procedures for Handling Criminal Cases by Public Security Organs Article 237 The public security organs may, according to the needs of investigating crimes, inquire about and freeze the criminal suspect's deposits, remittances, securities trading settlement funds, futures deposits and other securities, bonds, stocks, fund shares and other investment rights and interests, and may require the relevant units and individuals to cooperate. The property specified in the preceding paragraph shall not be transferred, allocated or transferred or detained in disguised form by other means.

Article 243rd of the Procedures for Handling Criminal Cases by Public Security Organs: The time limit for freezing deposits, remittances, securities trading settlement funds, futures deposits and other property is six months. The maximum period of each freeze shall not exceed six months. For major and complicated cases, with the approval of the person in charge of the public security organ at or above the municipal level, the time limit for freezing deposits, remittances, securities trading settlement funds, futures deposits and other property can be one year. The maximum period of each freeze shall not exceed one year.

Article 242nd of the Civil Procedure Law of People's Republic of China (PRC) * * * If the person subjected to execution fails to perform the obligations specified in the legal documents according to the notice of execution, the people's court has the right to inquire about the deposits, bonds, stocks, fund shares and other properties of the person subjected to execution. From the relevant units. The people's court has the right to seal up, freeze, transfer or change the property of the person subjected to execution according to different circumstances. The property inquired, sealed up, frozen, transferred or changed in price by the people's court shall not exceed the scope of obligations that the person subjected to execution shall perform. When the people's court decides to seal up, freeze, transfer or change the price of property, it shall make a ruling and issue a notice of assistance in execution, which the relevant units must handle.