In the transaction interface, there is a bank-securities business menu. Click Bank-Securities Transfer to display the third-party depository (a bank). Or first open the free customer service phone of the securities company to inquire about the bank bound by the three parties, and then bring your ID card to the bank to inquire which bank card it is. Bank cards associated with stocks are generally managed by a third party. The third-party depository system refers to the settlement funds managed by securities companies, banks and other third parties. This is mainly to put an end to the misappropriation and pledge of customer funds by securities companies in the past, and also to avoid the risk of customer account funds caused by management factors of securities companies.