You don't need this. When you retake the course, that is, when you register online in the fourth week, enter the course number you took. Note: The course number must be correct! ! ! Then submit and choose "self-study and repeat" so that credits will not accumulate. Your credits will be added to the personal information system, not to the academic affairs office. Study hard and fail the course, which is what every company doesn't want to see. . PS: According to the regulations of Sichuan University, as long as you get more than 180 credits, you have to pay. But the school also wants you to take more courses, so it often doesn't charge more. As long as you don't get more than 200 credits, you shouldn't charge money! ! ! I didn't listen to the senior and senior pay more. . . Study hard!