1. Computer query: Please log in to your trading software. After entering the system, click Query to inquire about historical transactions, capital flow and share capital. Detailed information includes shareholder account number, shareholder code, etc.

2. Mobile phone inquiry: On the buying page, entrust stocks in Shanghai or Shenzhen, and confirm that there is shareholder account information in the box (it is not really necessary to buy).

3. The seat number of the business department where your shareholder account is located can be found on the websites of Shanghai Stock Exchange and Shenzhen Stock Exchange through the ID number.