One hundred thousand Why is a set of popular science books for teenagers edited and published by Children's Publishing House in the early 1960s. The latest edition is the sixth edition, and the editor of the sixth edition is Han Qide.
In the past 50 years, this set of books has been published in six editions, and the cumulative circulation has exceeded 1 100 million copies. It is a scientific enlightenment book for several generations of young people in New China, and has become the first brand of original popular science books in China. It has played an active role in spreading knowledge and popularizing science, and has influenced generations of young people to embark on the road of science.