(Professional video tutorials on badminton system training and improvement, demonstrated by Li Zaifu, explained in English, a total of 33 episodes, the teaching content is divided into four parts: 1) The four basics of badminton. 2) Learn the correct badminton movement and life attitude. 3) Learn badminton hitting techniques; 4) Learn badminton forehand and backhand, doubles techniques and tactics. The content of this course is very professional, suitable for athletes who have a certain professional foundation and want to quickly improve the level of badminton.)