《魏书·列传·卷四十一》
等到改置百司，开建五等爵制，高祖请李冲参与制定典制法式，封他为荥阳郡开国侯，食邑达八百户，拜授廷尉卿。
及改置百司，开建五等，以冲参定典式，封荥阳郡开国侯，食邑八百户，拜廷尉卿。
When the time came to reorganize the bureaucracy and establish the five ranks of nobility, Gaozu asked Li Chong to participate in formulating the rules and procedures of the 典制法式. He gave him the title of 荥阳郡开国侯, an income of 800 families, and appointed him 廷尉卿.