Uncle Kai's storytelling is the largest childhood story brand in China. Its founder is Wang Kai, a famous host of CCTV. Its audio content includes Romance of the Three Kingdoms, Journey to the West, and high-quality picture books. Based on virtual content, physical products are derived and hardware products matched with audio content are manufactured. The story machine has a built-in story of the Three Kingdoms recorded by Wang Kai, and the sales broke 1 million on the first day of release. The product adopts the form of tumbler, waterproof and fall-proof, suitable for babies to use before going to bed and bathing scenes. Let traditional paper books become sound movies on paper.