Cao Hong
In 217, when Cao Cao ordered his general Cao Hong to lead troops to attack Liu Bei's forces at Xiabian County (下辨縣; northwest of present-day Cheng County, Gansu), he also appointed Xin Pi and Cao Xiu to serve as Cao Hong's deputies. Cao Cao also issued a memo to them as follows: "In the past, when Emperor Gaozu indulged in luxury and women, Zhang Liang and Chen Ping were there to point out his mistakes. Today, Zuozhi and Wenlie will ensure that (Cao Hong) will not be careless."