This method is not valid for all versions.

The most effective way is to end the Su Yaxing process, but this process is usually protected or the task manager can't open it at all.

You can open the main interface of Su Yaxing's student side. There is a student's head in the upper left corner. Click the left mouse button on the head first, then click the right mouse button, and then double-click the left mouse button. Su Yaxing will collapse and quit.