Huang Kai wrote his letter offering to surrender and gave it to Han Tse.When dark fell,Han Tse disguised himself as a fisherman and sailed to the north bank of the river.When he arrived at Ts'ao Ts'ao's camp,he was stopped by Ts'ao Ts'ao's patrols.Han Tse said,"I am a staff officer from Wu Kingdom and I have an important secret to report to Premier Ts'ao Ts'ao."