Four Ning and Four Bies are from Fu Shan's Xunzi Tie, which embodies the Taoist aesthetic thought. "Four Ning and Four Nothing" means "I would rather be ugly than flattering, Ning Zhuo is not clever, I would rather be fragmentary and not smooth, and I would rather be rough and not arranged", and even gave birth to "Ugly School" calligraphy, from which Fu Shan, a calligrapher with "Four Ning and Four Nothing", became the originator of "Ugly School" calligraphers.
Fu Shan is a rare all-rounder in the ancient cultural history of China. He is not only a brilliant painter and calligrapher, but also a representative of adherents in the late Ming and early Qing Dynasties, a leader of northern academic thought, a famous Taoist scholar, a famous doctor, and even known as a "Wulin master". Looking at Fu Shan's life style and thoughts, we can see that he is essentially a Taoist character: learning is based on truth, sincerity and freedom, and opposes authoritative dogmatism. Therefore, he extremely hates the servility of slave Confucianism as a scholar: "If I were a slave, I would never find an ethereal dharma realm. I just rely on half the footnotes of my predecessors to say that I have a basic knowledge, which is just biting people's heels." From this, he strongly criticized the hypocrisy of the so-called upside down society at that time. On many occasions, in his works, he repeatedly emphasized and warned himself that "old people learn from Laozi", "I am a disciple of Zhuangzi", "I am a teacher of Zhuangzi", "I am a painter" and "Yugong and his son learn from Zhuangzi". He also said with deep affection: "I won't be soft-hearted if I don't read Laozi for three days. I used to study languages. After fifty years, I paid attention to Laozi, but I felt that my predecessors were good scholars. They only needed a lot of tongues, and they were always soft. Why? I am sitting and speculating, I can't hear you. " "Wu Zhuangweng said that Yu Xu could be a Yao and Shun man."