When Gan Ning brought his followers to
Jiangdong,
Zhou Yu and
Lü Meng recommended him as a talent to their lord,
Sun Quan. Sun Quan felt that Gan Ning was an extraordinary man and treated him like an old friend. Gan Ning proposed: Sun Quan wanted to follow Gan Ning's plan, but his adviser
Zhang Zhao strongly objected: "The territories in Wu have not been completely pacified yet. If we proceed with this campaign, I am afraid there will be chaos." Gan Ning rebuked Zhang Zhao: "Our lord has entrusted responsibilities to you as if you were
Xiao He. If you can't even be confident that there won't be chaos under your watch, how can you expect to be like Xiao He?" Sun Quan then raised his glass to Gan Ning and said: "Xingba, I have decided to put you in charge of the campaign this year just as I offer this drink to you. You should strive your best to come up with a strategy to defeat Huang Zu. Once you have proven yourself, you won't need to take Zhang Zhao's words to heart." In the spring of 208, Sun Quan led his forces west to attack Huang Zu at Jiangxia Commandery (江夏郡; around present-day
Xinzhou District, Wuhan,
Hubei) and succeeded in defeating and capturing Huang Zu alive, as well as taking control over his troops. Gan Ning was placed in command of some soldiers and ordered to garrison at Dangkou (當口). Sometime in the late 200s to early 210s, Gan Ning were involved in a revolt orchestrated by some officials against the newly ascended
Liu Zhang, whose father who had just died. Liu Zhang sent Zhao Wei (趙韙), a key ally of his late father, to march on the rebels and managed to suppress the rebels and forced them to flee into Jingzhou (荊州) in the east.
Saving Su Fei Before the campaign, Sun Quan had prepared two boxes for containing the heads of Huang Zu and Su Fei (蘇飛). After the battle, Su Fei, who had become a prisoner-of-war, immediately asked someone to inform Gan Ning. Gan Ning said: "If Su Fei didn't say anything, I would have forgotten about him." Later, when Sun Quan and his officers were celebrating the victory, Gan Ning left his seat and knelt down before Sun Quan. He
kowtowed until his face was covered in blood and, with tears in his eyes, he pleaded with Sun Quan: "I owe Su Fei a favour. If not for him, I'd have been dead and my body abandoned in a ravine. I'd not have been able to serve under you. Now, even though Su Fei's actions warrant death, I still hope you can spare him." Sun Quan was moved and he asked: "What if he leaves after I spare his life?" Gan Ning replied: "Su Fei will be grateful if he is spared from death. He won't leave even if you try to chase him away. Why would he still court his own doom? If he really does that, I am willing to use my head to replace his in the box." Sun Quan then pardoned Su Fei. ==Red Cliffs campaign==