The main content of Romance of the Three Kingdoms is in chapter 68 or 69.

Cao Cao was ill in bed with fright. Xu Zhi came to see Cao Cao and recommended Guan Ju, a strange man, as Cao Cao's divination. Guan Luo is a master of Zhouyi. He has been good at actuarial and physiognomy since he was a child. On one occasion, the prefect Dan Zichun invited Guan Luo to dinner. Guan Luo was eloquent at the banquet, and everyone praised him. Guan Luo's talent cannot be finished in a few words. Cao Cao also heard his name, so he summoned Guan Luo, who made several divinations for Cao Cao. Everything happened accurately, so he trusted Guan Luo very much and followed Guan Luo's advice and stayed in Yecheng. Ji Geng and others discussed killing Cao Cao and set fire to the city on the fifteenth night of the first month. ...