With double values of history and calligraphy, Yao Yuanqing Epigraph of Tang Dynasty un- earthed in Ruicheng reflects the specific style of regular script as well as the change of history and official posi- tion in Wu Zetian Period in Tang Dynasty. It also mirrors the.appearance of regular script which has transformed gradually from the features of Bafen alike and Zhangcao alike in the early Tang Dynasty to broad and square in the middle Tang Dynasty.%山西芮城出土的唐代《姚元庆墓志铭》具有历史和书法双重价值，既反映了唐代武则天执政时期的历史以及官职变化，也反映了武周时期特有的楷书风格。即从初唐楷书外形特征“体若八分、势同章草”逐渐向唐中期的宽博方正过渡。
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