Xin Pi
Some days later, when Xin Pi attended a feast hosted by Cao Cao, he noticed that Cao Cao had changed his mind after observing his facial expressions, so he spoke to Cao Cao's adviser Guo Jia. After Guo Jia told him, Cao Cao asked Xin Pi: "Can Yuan Tan be trusted? Can Yuan Shang be defeated?" Xin Pi replied: