In the Yuan Dynasty, the calligraphy research of Kanglizishan had a high status and great influence. "Critics say that those who claimed the title of the book in the national dynasty became public servants after Duke Wei of Zhao" (Taoshu History Society), which was called "Zhao Bei".
Zi Shan was personally taught by Zhao Yubei on his way to study books. Zi Shan, like his teacher, tried hard to pursue the ancient laws of Jin and Tang Dynasties without rejecting the classics of Song people. Tao's Book History Society said: "(Zi Shan) is the calligrapher Yu Yongxing, the calligrapher Zhong Taifu and Wang Youjun." He Liang Jun's "Four Friends Zhai Cong said" said: "Zi Shanshu comes from the Daling, and there is the Minang Palace next to it." In the process of drawing lessons from the ink of previous calligraphy posts, Zishan absorbed the essence of Bo Gu's present by his own understanding, and integrated it into his own pen, forming a sharp, euphemistic, pure and strong personal face. He not only won success, but also won the respect of the world. "The History of the Yuan Dynasty" says: "The knower said that (Zi Shan) won the brushwork of the Jin people, only one piece of paper, and people competed for treasure, not for gold and jade."
Among the calligraphy styles that Kang Lizishan is good at, cursive script is the most prominent. The early cursive script is characterized by neat brushwork, clever turning and elegant posture. Although the characters are not in the same category, they are not connected. This kind of works is represented by Yan's Notes on Zhang Xu's brushwork. Although the works in his later years are like brushes, they are covered with paper, and the contrast of brush strokes is particularly strong, but they are not bold and do not involve risks. They are often mixed with Cao Zhang's brush strokes, full of ancient fun. Such works are typical of Li Bai's poems.
Of course, Kang Lizishan's calligraphy also has some shortcomings. Fang Ming Xiao Ru's "Xun Zhi Zhai Ji" says: "It is gratifying to walk in the grass if you are good at hanging your wrist, but not enough to be calm." The problem of "impetuous" pointed out by Fang scholars believes that its root lies in Kang Richi's habit of quick writing. Ceng Yun: "I wrote 30,000 words a day, but I never stopped writing because I was tired." (Tao Zongyi's "Dropping out of Farming") Such amazing writing speed not only makes him good at antiquity, but also makes his calligraphy simple and calm.