There is a kind of divination in the Three Kingdoms-managing chromium, knowing astronomy above and geography below. What divination did he do for Cao Cao? Please describe it in your own language.

1, on March 8, the yellow pig met the tiger; The army in the south, the wound is broken. The previous sentence: "March 8" means twenty-four years of Jian' an; "Yellow pig meets tiger" is the first month of Jihai, and the second sentence refers to the battle of Dingjun Mountain where Cao Cao's younger brother Xia was hacked to death by Huang Zhong. 2. In the Lion Palace, calm his nerves; Wang Daoxin, later generations are extremely expensive. This means that Cao Cao can't claim the title of emperor when he dies, but his descendants can claim the title of emperor, which is extremely expensive. 3. A general died in the kingdom of Soochow, and soldiers invaded the territory of West Shu. Lu Su, the satrap of Soochow, died, and Liu Bei in the southwest sent Zhang Fei and Ma Chao to station troops to seize the pass, with the intention of capturing Hanzhong.

4, the king must not move, there must be fire in the spring. These are the three sons, Doctor Tai, Wei Huang and Ji Ping, who are going to light a fire overnight to rebel in Xudu.