伏允
Later in 634, Tuyuhun attacked Tang. Emperor Taizong was considering whom to send as the commander of the counterattacking force, and he made the comment, "It would have been wonderful to have Li Jing as commander." When Li Jing heard this, he personally met with the chancellor Fang Xuanling and offered to be the commander. Emperor Taizong was pleased, and made Li Jing the commander, assisted by the other generals Hou Junji, Li Daozong, Li Daliang, Li Daoyan (李道彥), and Gao Zengsheng (高甑生). Tang forces achieved initial victories against Tuyuhun forces; in response, Tuyuhun burned the grass on grazing fields to try to cut off the Tang horses' food supplies, and the Tang generals mostly believed that they should retreat them. Hou advocated attacking, however, and Li jing agreed, pushing deep into Tuyuhun territory and greatly defeating them, capturing the wives and sons of Tuyuhun's Busabo Khan Murong Fuyun. Murong Fuyun's son Murong Shun surrendered, and Murong Fuyun was soon killed by his subordinates. Emperor Taizong created Murong Shun the new khan, and Tang forces largely withdrew, although Li Daliang remained.