Zheng Yuan [Yuan] Taoist priest, Quanzhen Taoist Jin Zhiyang disciples. Word useless, No. casual wood, Xu Jiang people. For the beginning of Sun Shu Ao monument monument, a time that good. After the inflow of the Song season bad habits, no foot view. "History will be"
Ailanthus [chū], "Ci Hai" on the interpretation of "plant name, namely Ailanthus altissima", "Chuan wood, Utah useless material." "Zhuangzi Escape": "I have a tree, people that the Ailanthus, its large swollen rather than in the rope ink, its twigs curly rather than the rules.Li of the Tu, regardless of care." Kind of roadside Ailanthus Trees, carpenters do not look to see, it is indeed useless material. Achille for the bulk material, metaphor in the world useless. In ancient times, such as self-proclaimed "Chuan material" is self-supporting words. It can be seen, Zheng Sui take the word useless, and since the number of casual wood, name, word, number meaning is unified, the code are from the Taoist Chuang Tzu.
Zheng Sui for the Yuan Dynasty painter Huang Gongwang of the Young. Huang Gongwang in his handed down masterpiece "Fuchun Mountains map" wrote above the inscriptions "is seven years, the servant of the Fuchun mountain home, useless division to, leisure in the South building aid pen written in this volume, Xingzhizhi, feel "After the" Fuchun Mountains "broken for two, after the section called" useless volume ", is now hidden in the Forbidden City in Taipei.