Invasion of Yingchuan In 546, Wang Sizheng was given the honorific title of Specially Advanced and promoted to Deputy Minister of the Left, Brach Secretariat of the Henan Circuits, Chief Controller and Inspector of Jing province. In 547, the Eastern Wei general,
Hou Jing rebelled against his state in the
Henan region and requested reinforcements from the Western Wei. The Western Wei court was not trusting of Hou and did not send any soldiers at first. However, Wang Sizheng, believing they should capitalize on the situation, brought 10,000 soldiers from his province, marching from Luyang Pass (魯陽關; southwest of present-day
Lushan County, Henan) to Yangdi (陽翟, modern
Yuzhou, Henan) without the court's permission. When they heard of Wang's movements, Yuwen Tai had to promote Hou Jing and send another general,
Li Bi to reinforce Wang. In June or July, the Eastern Wei generals,
Gao Yue and
Han Gui withdrew from fighting Hou Jing when they heard that Western Wei reinforcements had arrived. Wang entered
Yingchuan Commandery while Hou Jing moved to
Yu province, claiming that he was on the offense but secretly planning to surrender to the
Liang dynasty in the south. Wang then sent out his troops to occupy seven provinces and twelve towns owned by Hou Jing. Yuwen Tai granted Wang tally and offered him the positions of Grand Tutor and Grand General while concurrently serving as Prefect of the Masters of Writing, Grand Branch Censorate of the Henan and Chief Controller of military affairs in the Henan, all of which were initially meant for Hou Jing. Wang refused to accept any of these positions, but after Yuwen repeatedly persuaded him, he only accepted the office of Chief Controller, and later, Grand General.
Siege of Changshe In 548, the Eastern Wei sent out under a massive army of 100,000 under Gao Yue, Murong Shaozong and Liu Fengsheng to invade Yingchuan. Wang was garrisoned at the city of Changshe, and despite the threat he faced, he was able keep the followers under control. Gao Yue, confident that Yingchuan would fall in a single battle, ordered his forces to surround the city on all sides. Wang selected the strongest soldiers from his force and sallied out. Unable to withstand the attack, Gao led his troops to retreat. Gao then built earthen mounds to overlook the city and used "flying ladders" and "fire chariots" to assault the walls day and night. In response, Wang lit short spears on fire and took advantage of the strong wind to fire them at the mounds and used fire arrows to burn the siege equipment that were on them. He also lowered his soldiers down with ropes outside the city and occupied two of the Eastern Wei's mounds, building battlements on them to help defend the city.
Surrendering to Gao Cheng In May or June, Gao Cheng personally led 110,000 soldiers to attack Yingchuan with a specific order to his followers to capture Wang alive. He rushed to the weir, raised his soldiers' morale and opened the water to flood Changshe. The northern wall of Changshe collapse and the whole city was flooded, leaving no place to stand. No longer able to defend the city, Wang brought his followers to one of the earthen mounds and said to them "I shouldered a heavy responsibility for the state, hoping to overcome the crisis and attain glory, but my sincere devotion was all for nought, and I have disgraced the imperial decree. Now our strength is exhausted and our path is hopeless. I have no other choice; I shall die in gratitude for the emperor's grace." He then looked up to the sky and cried before bowing west and drawing his sword to commit suicide. His followers also cried, but one of them, Luo Xun (駱訓) stopped him and said, "You often tell us that if we surrender our heads, not only will we be rewarded with wealth and honour, but we will also save the lives of an entire city. Now that Prime Minister Gao has offered the chance, should you not feel pity for our soldiers in the city?" The rest of his followers then joined in to stop him from committing suicide, so Wang decided against the decision. Gao Cheng sent his official, Zhao Yanshen (趙彥深) to the top of the mound to present Wang with a white feather fan and ask for his surrender. Wang agreed, and Zhao brought his down the mound to introduce him to Gao Cheng. Wang spoke with great enthusiasm and regret, but did not act as if he was surrendering. Gao Cheng was convinced by Wang's loyalty to the Western Wei court, so he stood up and saluted him, treating him generously from hereafter. == Death ==