What are the artistic characteristics of the work "Shimen Inscription"?

In the second year of the Northern Wei Dynasty (509), it was carved on the cliff of the stone gate in Hanzhong, Shaanxi Province, and is now moved to the Hanzhong Museum. Wang Yuan wrote the elixir, and Wu Aren engraved it. Wang Yuan, a native of Taiyuan, was a Dianxuan (a minor official who handled documents) in Liang and Qin states at that time. His status was not high, but his level is now so high that he is no less worthy of being listed among the masters of calligraphy. The handwriting is elegant and elegant, with a very high style. Kang Youwei once listed him as "the sect of Feiyi Hunmu".