After reading many classic and best-selling works, as well as the information collected from readers in recent years, the favorite works of contemporary children's readers are actually not imaginative works, let alone works that restore reality, but works that can make people have fantasies, escape from reality easily, but return to reality easily. The elven mouse is a very typical example. This type of work, the story background is realistic, most of the characters are realistic, but there is a super fantasy factor implanted in it, and it is precisely because of this super fantasy factor that the whole story suddenly becomes very different. We named it "optical illusion".

Shang's "Thumb Monitor" series is such a set of works. The Password of Yeast Soup is the second book in the Thumb Monitor series. It tells the story that Kong Dongdong has developed a yeast soup that can help people grow up ahead of time, and each sip will make them grow up by one year. With this yeast soup, Kong Dongdong lived an "adult" life ahead of schedule. He became temporary dad, a girl and a pigeon, and also became the nanny of President Feng's family. He also successfully sneaked into a criminal gang called "Rope Gang" to be undercover. The monitor Kong Xixi has not been idle. She turned herself into a beautiful female college student for a while and a charming woman for a while ... However, behind all this "growth", there are a series of secrets hidden. ...

This book is full of twists and turns, vivid plot, true reflection of campus life, promotion of fantasy theme, fluent and vivid language, plain humor and strong readability. Suitable for primary and middle school students aged 8 ~ 15.