Teacher Li Jingyu is from Hainan. Li Jingyu, the founder of etymology, was a TOEFL teacher in New Oriental. Teacher Li Jingyu takes you out of the misunderstanding of memorizing incorrect words, summarizes high-frequency vocabulary and roots in different exams, and makes targeted and efficient study, taking you to understand the logic behind words, the law of pronunciation and Green's law, truly understanding words, and realizing the skyrocketing vocabulary.