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. Influenced by it, books with the title of "100,000 Why" emerge in an endless stream, becoming synonymous with children's popular science books.

Although the series "100,000 Why" is aimed at children, young people and even adults like to watch it because of its vivid words and simple content. Especially during the Cultural Revolution, there were few readable books, and the circulation of "100,000 Why" published by workers, peasants and soldiers reached tens of millions.

In addition, many "whys" in "100,000 whys" come from daily life, which also makes it very practical. Many people have learned a lot of scientific knowledge, obtained reference materials and even obtained scientific enlightenment from it.

By the end of1990s, this set of popular science books had sold well for more than 30 years, with a huge circulation of 6 million sets (80 million copies), and now it still has a circulation of 654.38+10,000 sets every year.

From this, many similar popular science books have been derived, such as 100,000 whys for primary school students, 100,000 whys for children, 100,000 whys for new editions, 100,000 whys for social sciences and so on. One hundred thousand why has become a common title in popular science books.