Three Kingdoms: Yanzhou Was Taken Away by Liu Xu

I want to see how Liu Xu used this powerful genetic system to dominate the Three Kingdoms!   "Ding!" Congratulations to the owner for obtaining the unicorn gene and the supreme magical power.   "Ding!" Congratulations to the owner for obtaining the war horse gene and gaining super endurance and speed.   "Ding!"......   Liu Xu traveled through the late Eastern Han Dynasty and became the only son of the deceased Yanzhou governor Liu Dai, opening up a super powerful genetic system!   He was even named the Lord of Yanzhou and took Yanzhou away from Cao Cao!   Cao Cao was about to cry but had no tears: "I agreed that Yanzhou would be mine!" Why did Liu Xu snatch it away?