1. Miss Li Nan is a physics teacher in high school affiliated to renmin university of china. She has been engaged in physics teaching in senior high school for 10 years, and has trained many science champions and gold medal players. She has rich teaching experience and mature and effective teaching methods, and her hit rate on urgent problems has always been among the best.

2. Li Nan physics network course has a good reputation among students, and it is considered as a course with solid professional knowledge, interesting courses and humanistic care. Tsinghua University's master graduates are also tutors of physics competitions. The course is suitable for those students who have a good foundation in physics to sprint for high marks.