《资治通鉴·魏纪·魏纪二》
他又说： 过去我结交崔州平，他多次指出我的优缺点；后来又结交徐庶，得到很多启发和教诲；先前与董和商议事情，他每次都能做到知无不言，言无不尽；随后又与胡伟度共事，他的多次劝谏，使我避免了很多失误。
又曰： 昔初交州平，屡闻得失；后交元直，勤见启诲；前参事于幼宰，每言则尽；后从事于伟度，数有谏止。
He also said: In the past, I made friends with Cui Zhouping, and he pointed out my strengths and weaknesses many times; later, I made friends with Xu Shu and received a lot of inspiration and teachings; I discussed matters with Dong He before, and he was able to know everything and say everything every time; later I worked with Hu Weidu, and his repeated persuasion saved me from making many mistakes.