wu sikai, who claims to have become a "blue cat fan", said: "this mainland self-made cartoon is simply a children's encyclopedia. the content is lifelike and interesting. it makes me write songs more broad than in the past." this series is the opening work of "3,000 questions for blue cat naughty". each episode is an independent short story. most of these stories take place in the daily lives of children, introducing every detail of children's daily lives from all aspects. at the same time, through these short stories, we convey knowledge about astronomy, geography, life philosophy and other aspects to the children. how did the earth form? why do stars blink? how do polar bears live? the answers to a series of questions such as why people need to sleep are all in the humorous series "blue cat naughty 3000 questions" bbb