It describes the campus life and interesting stories of lower grade primary school students with Ma Mingjia as the protagonist, such as the novelty of going to school in the first year, lying on the ground to learn a kitten to drink water, how to turn from enemies to friends with girls at the same table, and the contradiction of looking forward to the holiday and looking forward to the start of school, etc. It interprets the children's daily and interesting, simple and happy real life, as well as the various troubles that must be experienced in growing up. ddd