Zhangsun Wuji
In 631, despite Wei's advice against it, Emperor Taizong began setting up a feudal scheme where the great contributors to Tang rule would be granted posts as prefectural prefects, to be inherited by their descendants. (Subsequently, however, due to other officials' opposition—the strongest of which came from Emperor Taizong's brother-in-law Zhangsun Wuji—Emperor Taizong cancelled the feudal scheme.)