The steps to bind WeChat payment with 360 IOU are as follows:

1. Register an account on the 360 ??IOU official website and log in.

2. Click "My", enter "Account Settings", and click "Bind WeChat".

3. In the pop-up window, enter your WeChat account and password, and click "Bind".

4. After the binding is successful, you can use WeChat payment on 360 IOU.