Cai Jing, despite his outstanding knowledge, is insidious and cunning. When the New Party was in power and Cai Jing was in a high position, he did whatever it took to get revenge. He not only expelled Su Shi from Beijing, but also reduced Su Shi's calligraphy to nothing, calling it a pile of smelly shit. Not only that, but also ordered the whole country to destroy Su Shi's stone tablets one by one, leaving no stones.
After Cai Jing stepped down, the old party came to power. Su Shi and others hated Cai Jing's guts and dealt with him as he dealt with them. They sent people everywhere to look for the inscriptions written by Cai Jing and destroy them. They even expelled him from the ranks of calligraphers and changed "Mi, Cai, Su, Huang, Mi and Cai" to "Su, Huang, Mi and Cai".
From Baidu Encyclopedia!