伏允
In 634, Emperor Taizong, sending the senior general Li Jing to command the campaign against Tuyuhun's Busabo Khan Murong Fuyun, made Hou and Li Daozong the Prince of Rencheng Li Jing's assistants on the campaign. By spring 635, Tang forces achieved initial victories, but Tuyuhun forces then burned the grazing grass to cut the food supplies to Tang horses. Most Tang generals wanted to withdraw, but Hou advocated continued advance, and Li Jing agreed, eventually allowing complete victory, as Murong Fuyun was killed by his subordinates, allowing his son Murong Shun, whom Tang supported, to become khan (as Yidou Khan). Around the new year 636, after Murong Shun was assassinated by his subordinates, Emperor Taizong sent Hou with an army to try to secure the throne for Murong Shun's son Murong Nuohebo.