Cen Wenzhao out of the capital, but Cen Wenben interceded on his brother's behalf, stating that his mother favored Cen Wenzhao the most, and not having his brother around would cause his mother much distress. Emperor Taizong thus changed his mind, keeping Cen Wenzhao in the capital after summoning him and rebuking him. In 645, Emperor Taizong was attacking Goguryeo. Cen followed him on the campaign and was deeply involved in the logistics—so much so that his energy was drained. Emperor Taizong saw that he was speaking in ways that were unusual for him, and became worried, stating, "Cen Wenben came on this campaign with me, but I am afraid he will not return with me." Cen soon grew ill and died in You Prefecture (幽州, roughly modern Beijing). He was buried near the tomb of Emperor Taizong's wife, Empress Zhangsun, where Emperor Taizong would eventually buried himself. His nephew Cen Changqian and grandson Cen Xi later also served as chancellors. Notes and references Old Book of Tang, vol. 70. New Book of Tang, vol. 102. Zizhi Tongjian, vols. 185, 189, 195, 196, 197. 595 births 645 deaths Sui dynasty people Chancellors under Emperor Taizong of Tang Tang dynasty historians 7th-century Chinese historians Transition from Sui to Tang