Read a book that is thick and then read a thin one is Hua Luogeng’s famous saying.

"From thin to thick" means reading in a solid manner, pursuing the source of important words, being good at reading between the lines, studying the author's way of thinking, trying to figure out the author's writing intention, and through divergent thinking and Extend the knowledge of the article from multiple angles. "Reading a book thickly" is to cultivate the reader's ability to comprehend and draw parallels.

When our knowledge has accumulated to a certain amount, it is time to "slim down". You must also have your own thinking and discernment ability about the knowledge you have learned, discard the rough and select the essential, discard the false and retain the true, grasp the main essential things as a whole, outline the main points, clarify the context, establish the framework of the knowledge system, internalize it into your own things, and transform the complex into your own. For the sake of simplicity, change the book from thick to thin to improve efficiency.

About the author

Hua Luogeng (November 12, 1910 - June 12, 1985), former Vice Chairman of the National Committee of the Chinese People's Political Consultative Conference. Born in Jintan District, Changzhou, Jiangsu, his ancestral home is Danyang, Jiangsu. He is a mathematician, an academician of the Chinese Academy of Sciences, a foreign academician of the National Academy of Sciences of the United States, an academician of the Third World Academy of Sciences, an academician of the Bavarian Academy of Sciences in Federal Germany, and a researcher and former director of the Institute of Mathematics, Chinese Academy of Sciences.

Hua Luogeng is mainly engaged in research in the fields of analytic number theory, matrix geometry, canonical groups, automorphic function theory, function theory of multiple complex variables, partial differential equations, high-dimensional numerical integration, etc.; and has solved the problem of Gaussian complete triangle The problem of estimating sums, improvement of Waring and Tarry problems, proof of the basic theorem of one-dimensional projective geometry, research on the application of modern number theory methods, etc.; is listed as one of the 88 great figures in mathematics in the world today in the Museum of Science and Technology in Chicago.