Si's calligraphy is complete in brushwork, exquisite in brushwork, rich in brushwork, vigorous in brushwork, well-proportioned in flesh and blood, full of vitality, concentrating ancient style and present meaning, full of weather, majestic, beautiful as a giant tripod, colorful as a beautiful jade, and agile as a flying stream. Horizontal ruler, vertical pen, stroke and stretch are all natural, dotted line and flying white, which shows the exquisiteness and beauty of Liu's style, the breadth, depth and stability of Zhao Mengfu's calligraphy, and the style of traditional statutes. Where you stretch your pen, you can see the spirit, and where you use the depth of ink, you can appreciate your character. Reading his calligraphy is both vigorous and elegant. If you look at the pure mind, it gives people a sense of transcendence and gives people a good enjoyment in a relaxed and natural atmosphere.