Onion Mathematics uses some interesting stories to explain mathematics, so some videos are open and free, and some videos and teaching materials are charged.

Onion Mathematics was founded by Yang, who graduated from Harvard University majoring in computer science, Zhu Ruochen, who graduated from Duke University majoring in biological science, education and psychology, and Li Nuo, a former innovation works "dim sum OS" technical executive, at the end of October/October/March. Onion Mathematics is an online tutoring product for primary and secondary school students, which has APP version and PC version. At present, mathematics and physics courses have been introduced, including primary school, junior high school and senior high school, covering the national 12 version of textbooks. Each class has 5-8 minutes of animation videos and intelligent exercises. Let primary and secondary school students learn individually. Every lesson of onion mathematics is created by a teaching and research team of more than 100 people, including famous schools, key schools and authoritative subject experts.