Yuan Hongdao said, "You can't write a book, but it is absurd to say that a long book is above Wang Yayi and Wen. Let's not talk about calligraphy, let's talk about the book god. A gentleman is sincere in the eight laws, and a chivalrous man is in the forest of words! " . The appearance of Xu Wei's calligraphy and calligraphy view coincided with the great changes in the whole thought, culture and aesthetic concept in the middle and late Ming Dynasty. Wei Shu also started from the rebellion of the Wu School of Calligraphy against the Tang Law, and then absorbed the positive factors of Su, Huang, Mi and others pursuing artistic individuality in the Northern Song Dynasty. Xu Wei's Aesthetic Spirit of "Always Showing the Meaning of Writing" in Preface to Lanting Collected by Ji Shu.
His exact words were: "This is not a special word. There are many things in the world. If you copy it and send it directly to your ear, you can compare it with each other. Is it true? " There are many people who copy Lanting, but they always show their intentions. They are called masters. If you want to read this manuscript, you can't know who it is, but if you read it, you must be an expert You Meng is like Sun Shuaio, like a man's torso? I am from the heart, too. "
If Xu Wei's running script has changed the traditional "arbitrary" brushwork, then the biggest change is the main hall running script with its head held high. In the past, it was said that "Dong Qichang destroyed Mohism", and here it is said that "Xu Wei destroyed brushwork". Xu Wei realized the change of brushwork in his works during the change from voluminous calligraphy to aesthetic display in the classroom.
His representative works include Dai Ying's brave Cao Jian Shu Axis and Dai Ying's brave Cao Mo Shu Axis. Xu Wei's drawing lessons from painting is a creative destruction of the brushwork in Jin and Tang Dynasties and a change in the artistic tendency of calligraphy. Xu Wei's calligraphy is in sharp contrast with the dull atmosphere in the early Ming Dynasty. What he is best at is the majestic weeds, but it is difficult for ordinary people to understand and is not good at using pens.