When they arrive at the tent, Zhou Yu crashes in a diagonal position on the bed, so that it is impossible for Jiang Gan to lie down. In addition, Zhou Yu vomits all over the bed. Jiang Gan can not sleep there, so he calls for a servant, but no one answers. He takes a peep on Zhou Yu’s confidential papers but does not find anything useful. Then he discovers a copy of The Spring and Autumn Annals. He turns some pages in the book and finds a letter written by Cai Mao and Zhang Yun. He is surprised when he reads the contents of the letter. They want to trade Cao Cao’s head for high official rank and wealth given to them by Zhou Yu. Jiang Gan hides the letter in his sleeve and finds a way out of Zhou Yu’s camp. He takes the same boat as he came with, back to the north bank of the river, where he meets Cao Cao and reports his completion of the assignment. He presents the letter to Cao Cao, who reads it.
周瑜到寢帳斜橫在床上，讓蔣幹不好睡，並且吐得一床，蔣幹無法，呼當差卻沒人答應，偷看周瑜的秘密公事也沒有看到有用的東西。發現一本春秋的書。在書中翻出一封信，是蔡瑁、張允寫來