《晋书·列传·第三章》
常道乡公即位，授他为太保，位在三司之上，封为寿光侯。
常道乡公即位，拜太保，位在三司之上，封寿光侯。
Upon Changdao Township Duke’s ascension, Zheng was granted the title of Grand Protector, above the Three Departments and enfeoffed as the Marquis of Shouguang.