There is no repetition. Draw inferences from others is a book published by Zhejiang Science and Technology Publishing House in July, 1999, which mainly focuses on the knowledge of mathematics, and is not repeated with the Secret Book of Learning and Thinking. The Secret Book of Learning Thinking covers the first to sixth grades of primary school and is based on the textbook compiled by the Ministry. The content includes basic knowledge, ancient literature and other sections, mainly about Chinese knowledge.