官渡之战
In 199, when Cao Cao and Yuan Shao were about to clash at the Battle of Guandu, Yuan Shao sent a messenger to meet Zhang Xiu and propose an alliance between them against Cao Cao. Zhang Xiu wanted to agree, but his adviser Jia Xu told Yuan Shao's messenger, "I say 'No, thank you.' to Yuan Benchu. He can't even accommodate his own brother. What makes him think he can accommodate talents from around the Empire?"