Are Su, Huang, Mi and Cai, the four great poets in Song Dynasty, Cai Xiang or Cai Jing? Why do some people say Cai Jing? What is the reason?

Cai, the four great calligraphers in the Northern Song Dynasty, was originally named Cai Jing, not Cai Xiang. Qin Gui, the traitor, was mentioned upstairs. Qin Gui is bad, but he is not among the six thieves of the Northern Song Dynasty, and Cai Jing is among them. It shows that Cai Jing's conduct is so bad (to be precise, so bad) that when evaluating the four great calligraphers, Cai Xiang, who has a better reputation, replaced Cai Jing.