Why did Xu Wei choose Zhong You, Wang Xizhi and Suo Jing to study calligraphy?

For Wei and Jin calligraphers, Xu Wei chose Zhong You, Wang Xizhi, Suo Jing and others, especially Suo Jing's calligraphy, and had a unique understanding. He said in Shuo Wen Jie Zi: "Although I studied Suo Jing's book, the outline was not good, but people regarded it as a chapter. I don't know if the seal is a little accessible, but I will go beyond it and imitate the seal. " Obviously, ordinary calligraphers only pay attention to the brushwork of official script in Cao Zhang, but Wen Chang can get a glimpse of the brushwork of seal script and understand and integrate the meaning of seal script, which is really superior. The frequent strokes in his calligraphy and cursive script should be the result of understanding Suo Jing, Cao Zhang and others.