Then messenger sent by Huang Kai crossed the river and brought the surrender letter to Ts'ao Ts'ao.Ts'ao Ts'ao opened the letter and read it.In the letter,Huang Kai explained that he would kill the other Wu Kingdom generals and then lead his men to Ts'ao Ts'ao in the evening under a banner showing a blue dragon.Ts'ao Ts'ao was pleased.He boarded a warship with his generals and looked toward the south waiting for the arrival of Huang Kai's fleet.