He said in "Comments on Words": "I studied Suo Jing Shu, but even though I couldn't understand the outline, people looked at it in terms of chapters and cursives. They didn't know that the chapters were slightly loose and close, while the Suo was super and imitating seal script. "Obviously, ordinary calligraphers only pay attention to the official script writing style in the seal script, but Wen Chang can get a glimpse of the seal script writing style and understand the seal script meaning, which is indeed superior to others. The wavy and picky strokes that often appear in his writing and cursive writing should be the result of understanding the cursive writing of Suo Jing and others.
As for the calligraphers of the Song Dynasty, Xu Wei believed that Su Shi, Huang Tingjian and others focused on the shaping and arrangement of external glyphs, while Mi Fu focused on the expression of inner emotions. Therefore, he highly respected Mi Shu. The strong irrational factors and wild and wanton characteristics often shown in his cursive writing are exactly derived from the rice character.
As for Ming calligraphers, Xu Wei admired Zhu Yunming and others very much. He has studied Zhu Yunming's calligraphy very deeply, and even his variant calligraphy can be recognized without looking at the inscription. In Zhu's cursive script, the lines are airtight, interspersed with each other, and integrated into one, which is the first of Xu Wei's dense calligraphy. In addition to the above, Xu Wei was also more or less influenced by Huai Su, Su Shi, Zhang Bi, Ni Zan and others.