Because some customers often forget their account numbers, they will contact the account managers of securities companies for enquiries.

There is also the need for customers' fund accounts in the process of handling some businesses, such as activating dormant accounts and handling transfer business.

The securities company can only query the account number, and the customer's password and other information are confidential and cannot be queried, so it is safe.

If you are not at ease, you'd better contact a regular brokerage to open an account.