The secondary card cannot be bound to WeChat, but the main card can search for "China Construction Bank" (Chinese characters) in the "service number" of WeChat official account. Click "Follow" to enter the bottom of the dialogue page. There are three menus, yue life: micro-loan, bound credit card. You can search for "China Construction Bank" (Chinese characters) in the "service number" of WeChat official account according to the page prompts. You click on "micro-loan" and credit card, and then you have the "binding" function. Log in to WeChat-the three points in the upper right corner-my wallet, and set the binding according to the prompts before you can use it.