About Cao Xueqin is an important research paper written by Mr. Mao Dun after the founding of the People's Republic of China and published in 1963. This article is very long, with a text of nearly 10,000 words. It has a deep, systematic and incisive discussion on many issues of Cao Xueqin and A Dream of Red Mansions, which has great influence and is a masterpiece of A Dream of Red Mansions. Not only is the text of the article very meaningful, but the annotation 14 added by the author at the end of the article is 9000 words long, which carefully sorts out the relevant materials of A Dream of Red Mansions and is also of great reference value to the study of A Dream of Red Mansions. Not only that, the author also wrote "Some Notes on Cao Xueqin's Third Revision", which explained Cao Xueqin's revision in detail in five points, and said that "if you continue to have opinions, you are welcome to consider making the fourth revision". [9]

In About Cao Xueqin, Mr. Mao Dun spoke highly of Cao Xueqin and A Dream of Red Mansions. The above-mentioned defects or cloud deviations in A Dream of Red Mansions are basically corrected in this paper, which also shows the development of Mr. Mao Dun's view of a Dream of Red Mansions.

Let me start with Mr. Mao Dun's evaluation of Cao Xueqin.