This is an episode from the Three Kingdoms. Cao cao sent a letter to Zhou Yu to summon him to surrender. Zhou Yu tore Caos letter to pieces. Zhou Yus classmate， Jiang Gan， was working for Cao Cao as an adviser， Jiang offered to travel to Wu to persuade Zhou Yu to surrender. One day while Zhou Yu was discussing with his subordinates how to defeat Cao Cao， he was told that Jiang Gan had come to see him. Zhou immediately figured out that Jiang must have come to persuade him to surrender. Zhou Yu devised a clever plan to thwart his efforts and enlisted the help of his subordinate to carry it out. Then he went to meet Jiang Gan all smiles. Zhou Yu took Jiang Gans hands and marshaled him into his tent and treated him to a banquet. When all his generals and subordinates came for dinner， Zhou Yu told those around the table： This is an old friend or mine. Though he came from the Cao Cao camp， he did not come to persuade me to surrender. Please do not suspect him. After the banquet， Zhou Yu pretended that he had too much and invited Jiang Gan to his bedroom for a rest. Zhou Yu soon pretended to have fallen asleep. Jiang Gan took this chance to thumb through Zhou Yus documents. He was shocked to find a letter from Cai Mao and Zhang Yun， two generals of the Cao camp， who had written Zhou Yu to surrender. Jiang hid letter of surrender in his pocket and returned to the bed， pretending that he was sill asleep.

　　After midnight， someone sneaked into Zhou Yus tent and woke him up， telling him A messenger came from the Cao camp to say that Cai Mao and Zhang Yun were not yet a position to carry out their plan. After he heard the news， Zhou Yu went back to sleep. Jiang Gan got up again silently and snuck out of Zhou Yus camp. He crossed the river immediately and handed the letter of surrender to Cao Cao. Cao was enraged and he had Cai Mao and Zhang Yun executed.

　　When the news spread to Wu， Zhou Yu burst into laughter and said， Cai Mao and Zhang Yun were the two generals I feared most. Now I fear no one. Before long， Cao cao realized that he was cheated by Zhou Yus stratagem of sowing distrust in Caos camp.

　　曹操給周瑜下了一道降書，周瑜見書，撕得粉碎。周瑜的老同學蔣干在曹操手下當謀士，他自告奮勇去東吳勸降周瑜。這天，周瑜和部下商議破曹計策，有人報告蔣干來了。周瑜一聽，就知道蔣干來作說客，眉頭一皺，向部下說出了自己的妙計，然后笑著出帳迎客。周瑜挽著蔣干的手進帳，并設宴招待。待眾將到齊后，周瑜對大家說：這是我的老朋友，雖然從曹操那里來，但不是來當說客的，大家不要懷疑。宴畢，周瑜假裝喝醉，挽蔣干同榻休息，不一會，周瑜佯裝睡著。蔣干輕輕起身，翻看周瑜的案卷，得知曹軍中的蔡瑁、張允二將軍給周瑜寫了降書，大為吃驚，急忙藏起降書，輕輕躺回床上，假裝睡著。后半夜，有人進帳叫醒周瑜說：曹營有人來了，蔡瑁、張允說現在還不能下手周瑜聽罷，躺下又睡。蔣干偷偷起來，徑直出營，過江把信交給曹操。曹操大怒，殺了蔡瑁，張允。消息傳到東吳，周瑜哈哈大笑說：我所擔心的就是這兩個人，現在我什么都不怕了。事后，曹操醒悟，知道中了周瑜的反間計。

　　This is an episode from the Three Kingdoms. Cao cao sent a letter to Zhou Yu to summon him to surrender. Zhou Yu tore Caos letter to pieces. Zhou Yus classmate， Jiang Gan， was working for Cao Cao as an adviser， Jiang offered to travel to Wu to persuade Zhou Yu to surrender. One day while Zhou Yu was discussing with his subordinates how to defeat Cao Cao， he was told that Jiang Gan had come to see him. Zhou immediately figured out that Jiang must have come to persuade him to surrender. Zhou Yu devised a clever plan to thwart his efforts and enlisted the help of his subordinate to carry it out. Then he went to meet Jiang Gan all smiles. Zhou Yu took Jiang Gans hands and marshaled him into his tent and treated him to a banquet. When all his generals and subordinates came for dinner， Zhou Yu told those around the table： This is an old friend or mine. Though he came from the Cao Cao camp， he did not come to persuade me to surrender. Please do not suspect him. After the banquet， Zhou Yu pretended that he had too much and invited Jiang Gan to his bedroom for a rest. Zhou Yu soon pretended to have fallen asleep. Jiang Gan took this chance to thumb through Zhou Yus documents. He was shocked to find a letter from Cai Mao and Zhang Yun， two generals of the Cao camp， who had written Zhou Yu to surrender. Jiang hid letter of surrender in his pocket and returned to the bed， pretending that he was sill asleep.

　　After midnight， someone sneaked into Zhou Yus tent and woke him up， telling him A messenger came from the Cao camp to say that Cai Mao and Zhang Yun were not yet a position to carry out their plan. After he heard the news， Zhou Yu went back to sleep. Jiang Gan got up again silently and snuck out of Zhou Yus camp. He crossed the river immediately and handed the letter of surrender to Cao Cao. Cao was enraged and he had Cai Mao and Zhang Yun executed.

　　When the news spread to Wu， Zhou Yu burst into laughter and said， Cai Mao and Zhang Yun were the two generals I feared most. Now I fear no one. Before long， Cao cao realized that he was cheated by Zhou Yus stratagem of sowing distrust in Caos camp.

　　曹操給周瑜下了一道降書，周瑜見書，撕得粉碎。周瑜的老同學蔣干在曹操手下當謀士，他自告奮勇去東吳勸降周瑜。這天，周瑜和部下商議破曹計策，有人報告蔣干來了。周瑜一聽，就知道蔣干來作說客，眉頭一皺，向部下說出了自己的妙計，然后笑著出帳迎客。周瑜挽著蔣干的手進帳，并設宴招待。待眾將到齊后，周瑜對大家說：這是我的老朋友，雖然從曹操那里來，但不是來當說客的，大家不要懷疑。宴畢，周瑜假裝喝醉，挽蔣干同榻休息，不一會，周瑜佯裝睡著。蔣干輕輕起身，翻看周瑜的案卷，得知曹軍中的蔡瑁、張允二將軍給周瑜寫了降書，大為吃驚，急忙藏起降書，輕輕躺回床上，假裝睡著。后半夜，有人進帳叫醒周瑜說：曹營有人來了，蔡瑁、張允說現在還不能下手周瑜聽罷，躺下又睡。蔣干偷偷起來，徑直出營，過江把信交給曹操。曹操大怒，殺了蔡瑁，張允。消息傳到東吳，周瑜哈哈大笑說：我所擔心的就是這兩個人，現在我什么都不怕了。事后，曹操醒悟，知道中了周瑜的反間計。