When Zhang Zuyi died, he had a lot of research on India, officials and epigraphy. Seal cutting, Deng, Zongshigu, Zhong Ding; Li Fa Han Bei and Wei Tuan, both from Han and Wei San Dynasties, are typical styles of stele study. You can also use regular script, which also means monument. His achievements in official seal writing should be higher than cursive script. After middle age, his carefully crafted seal script works sometimes have a new rectangular seal with Deng's rule: "One word goes straight to 100 gold", which should be a recognition of the value of his art by the market at that time.