Step by step is a brand kiss. Huawei's official flagship universal BBK learning machine for primary and secondary schools, students' tablet computers, English reading machines for senior one to senior three, khaki-green textbooks, and intellectual and noble black textbooks for national courses (national course textbooks are updated synchronously). Step by step high school primary and secondary school learning machine from grade one to high school AI smart tablet computer student-specific point reading machine primary school network textbook synchronization English artifact children's junior high school early education 202 Khaki green national textbook synchronization update 12 inch standard version 64GB.