Arriving at Ch'ai Sang in Wu Kingdom,Lu Su asked Chu-Ke Liang to rest in an inn and went to report to Sun Chuan.Sun Chuan was discussing the military situation with his civil and army officials.One of the civil officials,Chang Chao,was advising him,"Ts'ao Ts'ao's power is great because he controls the emperor.He has recently taken Chingchou City.This means we have already lost half of the Yangtze River as our natural line of defence.I think the best way to settle is to surrender."