Able to write thousands of characters a day without a faulty stroke, Zhao Mengfu, the leader of “back to the ancients” movement, was expert at regular script which was neglected during the Song period in favor of literary quality in the semi-cursive. Overriding ostentatious Tang regular script formulas, he relentlessly modeled himself on Jin master-calligraphers, developing a facile, graceful style with evenly-emphasized, clean brushwork, which entitled him to be one of Four Regular Script Masters after Ouyang Xun, Yang Zhenqing and Liu Gongquan. “The abuses of calligraphy started from Yan Zhenqing, in whom the charm of the Jin was lost. Then appeared on the scene was Zhao Mengfu, who went straight to the Jin for inspiration, righting the malpractice of Yan Zhenqing and Liu gongquan,” praised Yang Shen, a scholar of Ming dynasty.