Also known as "flying white paper". A special kind of calligraphy. Legend has it that when Emperor Lingdi of the Eastern Han Dynasty decorated Hongdu Gate, craftsmen wrote with a broom dipped in white powder. After Cai Yong saw it, he classified it as "Fei Bai Shu". In this kind of calligraphy, the strokes are white, like dry pens.
Palace inscriptions were widely used during the Han and Wei Dynasties. Zhang Huaiguan of the Tang Dynasty wrote in "Introduction": "Those who are in vain are those who were made by Cai Yong, the left governor of the later Han Dynasty. Wang Yin, Wang Kui and Yun Yun: Bai Fei has become a model system. This is a palace question, and the situation is very high. The word should be slightly dissatisfied, which is called Bai Fei. " Tang Li Chuo's "Old History of Shangshu": "The flying white book began in Cai Yong, and it was created when it met a craftsman in Hongmen." Don Li Zhao's Supplement to Tang Shi: "Liang Wudi built a temple, which made Xiao Ziyun write the word' Xiao' in vain, and the word' Xiao' still exists today." Zhao Qingyi's poem "Wang Shu 'an stops at the ship's mausoleum to talk about the past" says: "Burning Huang Xin respects the first ridge, and flying white books should be given to the building. "
Since Wei, Jin, Southern and Northern Dynasties, Bai Fei has been admired by scholars. Wang Xizhi, a "book saint", and his son Wang Xianzhi are both good at drawing. Emperor Taizong loved flying white in Wang Youjun. Since then, many emperors in the Tang Dynasty have been good at flying white.