A U is a five-year-old child in Hangzhou. She lives with her parents and an intelligent robot "Tuzhi". As he grew up day by day, Ah Fu found himself adding a lot of troubles. His good friends Pang Dongdong, Mei Helan also have various problems.

A U is the protagonist in A You's Trouble, the first work of a series of comics 1 1. The play tells the psychological problems encountered by A U and his friends in childhood, which are mainly manifested in personality changes and behavior changes. These psychological problems have a negative impact on children's growth, so Ah U and his robot friend Tuzhi work together to help friends clear these psychological problems.