A messenger went post haste with a command for Cao Cao and Bao Xin,
Lord of Jibei, to act together in quelling the rebellion. As soon as Cao Cao received the court command, he arranged with his colleague first to attack the rebels at Shouyang. Bao Xin made a dash right into their midst and inflicting damage wherever he could, but he was killed in a battle. Cao Cao pursued the rebels as they fled. Ten thousand surrendered. Then Cao Cao put his quondam enemies in the van. When his army reached any place, many more surrendered and joined him. After three months of these tactics, he had won over many thousands, both of soldiers and ordinary folks.
Of these new adherents the strongest and boldest were made the Qingzhou Army, and the others were sent home to their fields. In consequence of these successes Cao Cao’s prestige and fame became very GREat and increased daily. He reported his success to Capital Changan and was rewarded with the title of General Who Guards the East.
[e] Yanzhou had belonged to Liu Dai, but he submitted to Cao Cao, and Cao Cao used the region as his base. [e] Zhang Liang, aka Zhang Zifang, the master strategist for Liu Bang. His family had served the state of Han as chief ministers during the Warring States period. It is said that he received the strategy book of Lu Wang from a mysterious old man. When he was young, Zhang Liang plotted to assasinate the First Emperor, but failed. He later rebeled against Qin. Joined Liu Bang （BC 206） to fight against Qin and then Chu. Recommended Han Xin to Liu Bang. Zhang Liang’s insights had earned him the name “The Teacher of Emperor”。 After Liu Bang won the empire, Zhang Liang was enobled as Lord of Liu, but did not take office, instead he resigned from political life and traveled. ……
At his headquarters in Yanzhou*, Cao Cao welcomed wise counselors and bold warriors, and many gathered around him. Two clever persons, uncle and nephew, came at the same time, both from Yanzhou, named Xun Yu and Xun You. The uncle had once been in the service of Yuan Shao.
Cao Cao rejoiced when he had won the elder Xun to his side, saying, “Xun Yu is my Zhang Liang*！”
He made Xun Yu a Marching General. the nephew Xun You was famed for his ability and had been in the court service when it was in Luoyang, but he had abandoned that career and retired to his village. Cao Cao made him a Military Instructor.
Xun Yu said to Cao Cao, “there is a certain wise person of Yanzhou somewhere, but I do not know in whose service he is.”
“Who is he？”
“Cheng Yu. He belongs to the eastern part of Yanzhou.”