Liu Cong was Liu Biao's youngest son. At first Liu Biao and his wife loved their youngest son Liu Cong and wanted to make him heir, and Cai Mao and Zhang Yun formed his faction. So the eldest son Liu Qi was sent out as Administrator of Jiangxia, and the faction at last upheld Liu Cong as heir. Because of this, Liu Qi and Liu Cong became enemies. Records, Wei 6 §90–91
Zhuge Liang's biography records that Liu Biao, heeding the words of his second wife, loved his youngest son Liu Cong and was not fond of Liu Qi. Liu Qi repeatedly asked Zhuge Liang how to keep himself safe, and when Zhuge Liang answered by citing Shensheng, who was in danger while he stayed inside, and Chong'er, who was safe outside, Liu Qi took the opportunity of Huang Zu's death to go out as Administrator of Jiangxia. Records, Shu 5 §9–10
In the seventh month, autumn, of the 13th year of Jian'an (208), Cao Cao set out south to attack Liu Biao, but before he arrived, in the eighth month, Liu Biao died of illness. Liu Cong succeeded him and was stationed at Xiangyang, while Liu Bei was stationed at Fan. Records, Wei 1 §104Records, Wei 6 §89
When Kuai Yue, Han Song, the Officer of the Eastern Bureau Fu Xun and others urged him to submit to Cao Cao, Liu Cong said, 'Why should I not now hold the whole land of Chu with you all, preserve the late lord's enterprise and watch how the realm goes?' Fu Xun said that for a subject to resist his sovereign was rebellion, and that it was beyond their strength to hold off the state with a newly founded Chu or to oppose Lord Cao with Liu Bei. He then asked Liu Cong how he judged himself against Liu Bei, and Liu Cong answered, 'I am not his equal.' Fu Xun said that if Liu Bei was not enough to stop Lord Cao, then even holding the land of Chu Liu Cong could not survive on his own, and if he was enough, Liu Bei would not be willing to stay beneath the general. Wang Can also urged Liu Cong to submit to Cao Cao. Records, Wei 6 §91–93Records, Wei 21 §4
The Biography of the First Sovereign records that when Lord Cao came south, Liu Cong sent an envoy to ask to surrender. Liu Bei, at Fan, did not know that Lord Cao had suddenly arrived, and only heard the news when Lord Cao reached Wan, whereupon he left with his followers. As they passed Xiangyang, Zhuge Liang said that if he attacked Liu Cong he could take Jing Province, but Liu Bei said he could not bear to, stopped his horse and called out to Liu Cong. Liu Cong was too afraid to get up, and many of Liu Cong's attendants and of the people of Jing Province went over to Liu Bei. Records, Shu 2 §20–21
The Annals of Emperor Wu records that in the ninth month, when Cao Cao reached Xinye, Liu Cong at last surrendered, and Liu Biao's biography records that when Cao Cao's army reached Xiangyang, Liu Cong surrendered the whole province. Liu Bei fled to Xiakou. When he surrendered, Liu Cong called Liu Biao's senior general Wen Pin to go with him, but Wen Pin did not follow, saying that since he had not been able to keep the province whole, he could only await punishment. Records, Wei 1 §104Records, Wei 6 §93Records, Wei 18 §34
Cao Cao made Liu Cong Inspector of Qing Province and enfeoffed him as a full marquis. Fifteen men of Jing Province, including Kuai Yue, were enfeoffed as marquises, and most rose to high office, Kuai Yue becoming Superintendent of the Imperial Household and Han Song Grand Herald. Sun Quan later recalled that Cao Cao, riding the momentum of having won over Liu Cong, boasted that he was coming down by water and land at the head of several hundred thousand men. The Records records nothing further about Liu Cong. Records, Wei 6 §94Records, Wei 1 §104Records, Wu 9 §90
In his assessment Chen Shou said that Yuan Shao and Liu Biao were both outwardly generous but inwardly jealous, and that since they set aside the legitimate heir to set up a younger son, abandoning propriety and exalting favour, it was no misfortune that their heirs were overthrown and their states toppled and destroyed. Records, Wei 6 §96