 Complete the following phrase:  Following Cao Caos defeat at the Battle of Red Cliffs in the same year, the victorious allied forces of Liu Bei and Sun Quan gradually took over the various commanderies in southern Jing Province, including Changsha. Huang Zhong actively urged Han Xuan to surrender to Liu Bei, who held strong influence in the province. Han Xuan conceded and Huang Zhong came to serve Liu Bei. Since receiving a military appointment at Jiameng 葭萌; present-day Zhaohua District, Guangyuan, Sichuan, Huang Zhong had performed well in Liu Beis 