Bank accounts can be frozen as long as criminal suspects are involved or related. Public security organs have the right to inquire about and freeze the deposits, remittances, bonds, stocks, fund shares and other properties of criminal suspects according to the needs of investigating crimes.

Relevant provisions of the Criminal Procedure Law of People's Republic of China (PRC):

Article 139 All kinds of property and documents found in investigation activities that can prove the criminal suspect's guilt or innocence shall be sealed up and detained; Property and documents irrelevant to the case shall not be sealed up or detained. The seized and detained property and documents shall be properly kept or sealed, and shall not be used, exchanged or damaged.

Article 140 The seized and detained property and documents shall be checked clearly with the witnesses and holders present, and a list shall be made on the spot in duplicate, which shall be signed or sealed by the investigators, witnesses and holders, one for the holder and one for future reference.

Article 142 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 have been frozen, they may not be frozen again.

Article 143. If the seized or detained property, documents, mails, telegrams or frozen deposits, remittances, bonds, stocks, fund shares and other properties are found to be really irrelevant to the case, the seizure, seizure and freezing shall be lifted within three days and returned.