These series are specially created by Ms. Bi Shumin for children. The second series include five volumes of "Xiaoyu Changing Skin", "Xiaoyu Sending Warmth", "Xiaoyu cutting nails", "Xiaoyu Seeing the World" and "Xiaoyu's Tooth Friends". It covers topics such as warmth, philosophy, popular science, cognitive enlightenment, life enlightenment, character development and spiritual growth, focusing on topics such as the sensory world, emotional management, and behavioral etiquette. It aims to cultivate Children's observation, imagination and creativity. The protagonist of the story, Xiaoyu, is a lively and lovely boy. He is full of curiosity about everything. Through the description of Xiaoyu's growth experience, he shows children's emotions and psychology. The story goes from easy to difficult, combining narrativeness, knowledge, and fun into one, making it a good partner for children on the road to growth.

Bi Shumin, an influential female writer in the Chinese-speaking world, a national first-class writer, a psychologist, and a traveler who has traveled around the world. She was called "the angel in white in the literary world" by Wang Meng. Bi Shumin's writing style is elegant and peaceful, full of sentiment and love which has beneficial influence towards young children. Her work is deeply loved by readers and have won many awards.