In this set of fiction books for children, the three little protagonists experienced such an adventure: they fell into the sundial tunnel in the forbidden city and got to know a dragon named “Big Loach”. They entered the world of the famous painting Riverside Scene at Qingming Festival and went to market, distinguished between real and fake bronze kings, and hosted a negotiation for peace in a country with powerful arms that had experienced tens of thousands of years of war… Finally, they returned to their own world. Through the adventure, the three little protagonists have obtained knowledge about traditional Chinese culture related to the cultural relics of the Forbidden City, ancient wooden buildings, collections of books, and legends of mythical beasts. And more importantly, they have gained courage, wisdom, friendship and love.