Everything is fine. Inspired by mathematical thinking methods, Hua has a deeper thinking and a broader vision, which is of great help to children's early intellectual development and improvement of logical thinking ability; This topic is difficult to understand. Each topic in the book falls into two categories: excellent articles and innovative articles. Excellent articles are probably the difficulty of previous China Cup preliminaries, while innovative articles have reached the difficulty of China Cup finals. Need to master the basic knowledge and methods of Xiao Ao. Hua (1910 121October 65438-1June 98512), former vice chairman of Chinese People's Political Consultative Conference, was born in Jintan District, Changzhou, Jiangsu, and his ancestral home was in Jiangsu. He is a mathematician, a member of the China Academy of Sciences and a member of the National Academy of Sciences of the United States.