What are the artistic features of Cai Xiang's calligraphy?

Cai Xiang (10 12 ~ 1067) was originally from Xianyou, Xinghua (now Putian, Fujian). Zeng Guan was in Fuzhou, Quanzhou and Hangzhou. Have good governance. Guan Zhiduan Ming TV University students. One of Song Sijia. Some people say that Cai in Su Huang Camouflage originally refers to Cai Jing, but because of Cai Jing's bad character, it was later changed to Cai Xiang. For example, according to age, Cai Xiang is 25 years older than Su Shi and 39 years older than Mi Fei, so it is not appropriate to put it at the end. Cai Xiang's handwriting is steady and he can write big characters, but his creativity is not enough. His works include Wan 'an Bridge and Shen Taotie.