Hello, based on your questions, here are the following: 1) The Public Security Bureau cannot directly freeze personal bank accounts; (2) For case handling or judicial needs, the Public Security Bureau needs to apply to the court to freeze the relevant banks involved in the case. Account, the court sends a letter to the bank, and the bank responds and signs, freezing the account in accordance with regulations; (3) The general freezing period is six months, which can be extended once according to needs, and the general extension is three to six months; if it is suspected of violating the law, etc. , the account can be permanently frozen. If there are no other reasons, unfreezing is very simple. We go to the bank where the bank card is opened, show our ID card, explain the situation to the bank staff, and then the unfreezing operation can be carried out. What are the conditions for a bank card to be frozen? (1) If we enter the incorrect password three times in a row at the ATM machine, the bank card will be frozen. (2) Also, after the bank card is reported lost, the bank card is frozen and cannot be used. (3) The bank card is lost and is seen by others performing malicious operations, and the bank card is frozen. (4) There are also credit cards that will be frozen after a period of time if they are not repaid in time. I hope my answer can help you, and I wish you a happy life~