I think it is essential for Dong Yu to have a direction, understand and remember the concepts and formulas in mathematics. It is a long-term process to consolidate knowledge and expand thinking by brushing questions. Although you won't get much in a short time, please don't give up. Every effort and fruitless process is called rooting.
Talent is not a cage that limits you. You have to believe that today's efforts will definitely become your feathers. Once you ride the wind, you will soar in Wan Li.