Onion math is good in both rounds. Onion Mathematics is an online mathematics learning platform, mainly for primary school, junior high school and senior high school students. The first round of courses is mainly aimed at primary school Olympiad and junior high school mathematics, including number theory, equations, algebra, geometry, probability and so on, to gradually improve students' understanding and problem-solving skills of mathematics and help them build a solid mathematical foundation. The second round of courses will further improve students' ability to master and apply mathematics knowledge, mainly aiming at junior high school foundation, and further involving related knowledge points in senior high school, including functions, trigonometric functions, series, plane analytic geometry, solid geometry, elementary calculus, etc., so as to lay a solid foundation for future college entrance examination and mathematics competition. So onion math is good in both rounds.