The earliest edition of "100,000 Why" was 2 1 volume, which was rearranged 70 years later, with a total of 23 volumes. The content is as follows:

(1) Mathematics (10) Animals

(2) Physical (1 1) plants

(3) Physical (12) plants

(4) chemistry (13) medical and health care

(5) chemistry (14) medical and health care

(6) astronomy (15) sports

(7) Meteorology (16) Sports

(8) Geography and Geology (17) Military

(9) Animals (18) Military

(19) human history (20) celestial history

(2 1) Earth History (22) Biological History

(23) Biological history

100,000 Why is a set of popular science books for teenagers edited and published by Children's Publishing House in the early 1960s. 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.