I already tried to cancel it. Without this function, the only thing I can do is:

Suppose you want to bind WX _ 1, QQ _ 1, pH _ 1 to a large open online course _ 1.

And your WX_ 1 just binds the MOOCW course _2, so you should log in the MOOCW course _2 with WX_ 1 first, and then bind a trumpet that you don't use much in QQ on the binding interface. Log out after successful binding. Log in to OCW _2 with QQ_2 (note: log in with QQ_2), and unbind WX_ 1 in the binding interface. In this way, your MOOCW course _2 is only bound by QQ_2. You log in to your MOOCW through QQ_ 1 and bind your WX _ 1 in the account binding interface, so that your MOOCW _ 1 is bound to your QQ_ 1 and WX_ 1 at the same time.

Other accounts and so on.