Zhuge Liang (played by Tang Guoqiang) borrowed arrows from a grass boat and caused Cao Cao (played by Bao Guoan) to lose 150,000 to 60,000 arrows. The successive failures made Cao Cao extremely annoyed, so he adopted the tactic of feigning surrender suggested by his counselors, and dispatched Cai Zhong and Cai He across the river to surrender to Soochow as an internal response to communicate the news. Zhou Yu (played by Hong Yuyu) used his plan to let Gan Ning (played by Han Dong) and Huang Gai (played by Xu Fuyin) stage a bitter trick, and sent Huang Gai to feign surrender to Cao Cao, and asked Kan Ze to go to Cao Ying to report the news. Kan Ze was captured in Cao Ying and handed Huang Gai's letter of surrender to Cao Cao. Cao Cao didn't believe it and said that the letter of surrender was full of flaws. He thought it was Zhou Yu's bitter trick and wanted to kill Kan Ze. Kan Ze laughed at Cao Cao's boast of being familiar with military books, but he couldn't see through the authenticity of it. Kan Ze interpreted the mystery for Cao Cao. Cao Cao believed it was true, thinking that Kan Ze and Huang Gai really wanted to surrender Cao, and wanted to reward Kan Ze, and sent Kan Ze back to Jiangdong to join Huang Gai. Kan Ze returned to Soochow and discussed with Gan Ning about investing in Cao in the big tent, which happened to lead to Cai Zhong and Cai He who were eavesdropping outside the door.