If you want to try to make up lessons, go to Shanghai Tengfei Education Network. Contact an online counselor to give you a history lesson directly. I feel that there is no problem after listening to it, and I am considering how to make it up. . . . . . This is not makeup. . I thought you were going to make up for the exam. If you don't make up lessons systematically now, you can look up some relevant history books or search information online according to the historical development you want to know.