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Books are an ocean of knowledge. What is a sailboat?
Knowledge is the ocean, and books are sailing boats. Knowledge is the ocean, and navigation is a book, which comes from 100,000 Why. 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.