Cui Yan
Cui Yan once recommended Yang Xun (), who was from Julu Commandery, to serve in the government. Although Yang Xun's abilities were not up to expectations, Cui Yan still nominated him on the grounds of excellent moral conduct. Cao Cao heeded Cui Yan's suggestion and employed Yang Xun. After Emperor Xian enfeoffed Cao Cao as a vassal king, Yang Xun wrote a memorial to the imperial court, glorifying Cao's achievements in his military campaigns and showering Cao with words of praise. Yang Xun was ridiculed by many people for his flattering behaviour; Cui Yan was also cast in a negative light because he was deemed as having recommended a sycophant to join the civil service. After the incident, Cui Yan read Yang Xun's memorial and wrote to him,