1. First, open the CITIC Securities app and log in to the account. In the navigation bar at the top of the main interface, find the option of "bond" or "fixed income" and click enter.

2. Secondly, on the bond page, you can choose to view different types of bonds, such as government bonds, local bonds and corporate bonds. Select the bond type you are interested in, find the bond whose income you want to check in the bond list, and click to enter the details page of the bond.

3. Finally, on the bond details page, you can find the yield information of bonds, including the current yield and yield to maturity. The above is the method for CITIC Construction Investment to inquire about the income of national debt.