Wang Can
Wang Can's talents came to fruition during his service in Cao Cao's administration. In 213, after Emperor Xian enfeoffed Cao Cao as the Duke of Wei and granted him ten cities to form his dukedom, Cao Cao tasked Wang Can with establishing a new system of laws and standards to replace the old one, which had largely fallen into disuse. In late 216, Wang Can accompanied Cao Cao on his fourth campaign against a rival warlord, Sun Quan.