Mi Fei was a calligrapher, painter and painting theorist in the Northern Song Dynasty in China. Wu is a native of Taiyuan. Character stamp,No. Xiangyang lay man, Haiyue mountain man, etc. Talent is high, characters are scattered, and they are so clean and addicted. Being served by the Tang people, they accumulate more strange stones. The world number is rice epilepsy. Calligraphy and painting are a family of their own. Be good at identification. He used to be a school book lang, a doctor of calligraphy and painting, and a foreign minister of the Ministry of Rites. Good at poetry and calligraphy, good at seal script, official script, model script, line script, cursive script, etc., and good at copying ancient calligraphy, reaching the level of confusion.

Mi Fei's calligraphy has been admired by later generations since the Song Dynasty. His calligraphy is called "brush", which means that his writing method is different from that of his predecessors.

Mi Fei's collected works are long lost, and 26 famous sayings of Hai Yue were recorded by his friend Zhang Jiafu on a piece of paper, which was preserved by Zhang Bangji's Random Records of Mo Zhuang in the Southern Song Dynasty. The core of Mi Fei's book theory is that the pen is naive and natural, and he makes the method of using the pen very vivid, vivid and easy to understand. Mi Fei's standard of storytelling is respecting Jin and belittling Tang Dynasty, which is related to the fact that the Tang people emphasized regular script, while Mi Fei was not good at regular script. Therefore, his book theory mainly focused on the method of calligraphy, including the weight of the pen, the size of the lines and so on.