If the bank card is frozen by the police in different places, you can ask the police about the situation. If the bank card is frozen by the police, it means that the bank card involves a criminal case. In this case, you should ask the police for information. The police will unfreeze and return the bank card after investigating the criminal case and confirming that it has nothing to do with the case.

Criminal Procedure Law of the People's Republic of China

Article 144 People's procuratorates and public security organs may, according to the needs of investigating crimes, inquire about and freeze the deposits, remittances, bonds, stocks, fund shares and other property of criminal suspects in accordance with regulations. The relevant units and individuals shall cooperate.

If a criminal suspect's deposits, remittances, bonds, stocks, fund shares and other properties are frozen, they may not be frozen again.

Article 145 Frozen property, documents, mails, telegrams, deposits, remittances, bonds, stocks, fund shares, etc. If the articles sealed up or detained are found to be really irrelevant to the case, they shall be released within three days. Seal up, detain, freeze and return.