Battle of Xiaoguan Shortly after Houmochen's defeat, Yuwen Tai founded the
Western Wei, competing with Gao Huan and his
Eastern Wei. In 535, he led his army east with Li Bi serving as his Chief Controller. Leading the right army, Li Bi attacked
Tongguan and Huiluo city (回洛城; in present-day
Mengjin,
Henan), occupying them. In 537, Li Bi was appointed Inspector of Yong province with equal ceremonials to the
Three Excellencies, and soon, he was promoted to General of the Cavalry and granted Privileges of the Three Excellencies. When Gao Huan brought his forces to invade Western Wei that year, Li Bi followed Yuwen Tai to fight the contingent led by
Dou Tai at Xiaoguan (小關; south of
Tongguan County, Shaanxi). He led the vanguard into battle and captured most of the enemies. Dou Tai's army was destroyed, and he was forced to commit suicide. Yuwen awarded Li Bi Dou's steed and armour for his reward. He then followed Yuwen to occupy
Hongnong.
Battle of Shayuan Later that year, Yuwen Tai faced Gao Huan again at the
Battle of Shayuan, and Li Bi commanded the right army. The Eastern Wei forces significantly outnumbered the Western Wei. Therefore Li Bi proposed to Yuwen that they occupy the Weiqu river (渭曲; southeast of present-day
Dali County,
Shaanxi) in the east, where they can lie in ambush among the reeds and attack at the appropriate moment when they sound the drums. When the Eastern Wei troops fell into the ambush and engaged with the left army led by
Zhao Gui, Li Bi brought with him 60 cavalrymen to attack them horizontally, thereby separating the Eastern Wei army into two. The Western Wei forces slaughtered them, incurring Gao Huan a great defeat. For his role in the battle, Li Bi was given the honourific title of "Specially Advanced" and enfeoffed as the Duke of Zhao Commandery.
Battle of Heqiao In October or November, Li Bi and
Heba Sheng conquered
Hedong Commandery and pacified the provinces of
Fen and Jiang (絳州; roughly southwest
Shanxi). In 538, when Yuwen Tai marched east to rescue Dugu Xin under siege by Eastern Wei forces at Jinyong, Li Bi commanded the vanguard. The Eastern Wei general,
Moduolou Daiwen led several thousand soldiers and suddenly reached Gucheng (谷城; near present-day
Luoyang, Henan) at night, where Li Bi and another general,
Daxi Wu was camped. Li Bi hurriedly sent his soldiers to shout and beat the drums, dragging firewood to bring about a cloud dust. Moduolou thought the main Western Wei forces had arrived and retreated, but Li Bi pursued him relentlessly, capturing his soldiers and beheading him. Moduolou's head was then passed around the Western Wei soldiers. The next day, Yuwen Tai and Gao Huan faced off at Heqiao (河穚; southwest of present-day
Mengzhou, Henan). Li Bi penetrated deep into the enemy lines and was wounded seven times. He was also captured and surrounded by several layers of guards. Li Bi feigned serious injury and suddenly collapsed to the ground, causing the guards to slightly relax. Then, he spotted a horse nearby, soon he swiftly jumped onto the horse and galloped west, thus escaping.
Pillar of State In 548, the northern
Jihu tribes rebelled, and Li Bi suppressed them. For his military achievements, Li Bi was promoted to Grand Protector and given the exclusive title of Pillar of State along with seven other officials including Yuwen Tai. In 552, as part of Yuwen Tai's policy of enforcing Xianbei surnames, Li Bi was given the surname of "Tuhe" (徒河). Later, when Yuwen Tai went west to carry out an inspection, Li Bi was ordered to stay behind to stand guard and handle with all state matters. In 556, when the Six Titled Retainers was established, Li Bi was appointed as the Grand Tutor and Grand Minister Over the Masses. That same year, the
Rouran Khaganate in the northern steppe were defeated by the
Göktürks, prompting them to surrender to Western Wei. Li Bi therefore led the vanguard to welcome them. After Yuwen Tai died and his nephew
Yuwen Hu took charge of the government, Li Bi was one of the few officials that he consulted with to discuss important affairs. == Death and posthumous honours ==