Ruisi English doll is called Professor. Reith English uses the courses and textbooks that Horton Mifflin Harcourt Education Group, an American education group, has invested heavily in for many years. Ruisi children's English course is complete and continuous, completely following children's cognitive rules, and the knowledge points and learning methods are from shallow to deep. In the whole learning process, English language, subject knowledge, English thinking and application ability have been improved in a spiral way.