There is a saying that happy reading is suitable for fifth-grade students. Youdao Happy Reading is the first Chinese graded reading course in China, which is suitable for children aged 3-12. It can cultivate children's reading strategies and skills, make children love reading, express themselves, be logical and reflective, and improve their reading ability in an all-round way. The fifth grade is about 10 years old, which is suitable for fifth grade students.