韩遂
Han Sui had a meeting with Cao Cao later. Han Sui's father and Cao Cao were nominated as "xiaolian"s (civil service candidates) in the same year, while Cao and Han were also former colleagues when they were working in the old capital Luoyang. When they met at close quarters (they were on horseback and their steeds were side by side but facing opposite directions), they spoke nothing about military affairs and had a mere lighthearted conversation about old times. When Han Sui returned to his camp later, Ma Chao asked him: "What did Cao Cao say?" Han Sui replied: "Nothing." Ma Chao and the others became suspicious of Han Sui.