Prepare a blank sheet of paper, start with the most important knowledge points, and hand-draw this part completely from memory. The more detailed, the better. It's all done, let's see how much knowledge you have. Then compare my hand-drawn mind map with the mind map made by software. What you haven't accomplished is what you haven't mastered or won't. This part needs more review. Repeat this process until you can complete all the mind maps without any help or tips. Print out the completed mind map, put it on the bed, put it in the office or other places where you often go all day. You can watch it in the morning, before going to bed at night and during work breaks. The mind map of review should not be too big. And the main branch should be within (7+-2), no more than 9 branches and no more than 7 layers. A text or a chapter is the most appropriate. Generally speaking, it only takes 2-5 minutes or less to read mind maps, and it only takes 20-30 minutes to review a book, and it should be reviewed at least twice a day. You can also turn the mind map into an image, set it as a computer desktop and send it to your mobile phone as a screen saver. In addition to morning and evening, you can also keep reviewing while driving, before eating, after eating, during rest and so on.