Zhou Yu knew Jiang Gan's purpose (to persuade him to surrender), but pretended to believe it, seemingly as if nothing had happened, and treated him as an old friend. In fact, he has his own plans, which shows that he has a deep talent. Jiang Gan was convinced that he was unsuspecting about doing things, pretending to be drunk and lying on the same bed, which gave Jiang Gan a chance to peek at the letters (conspiring with Cai Mao and Zhang Yun), making him fall for it, and then impeded him, removing the danger of his heart. It can be seen that Zhou Yu is good at planning and resourceful. Jiang Gan was convinced by the interlocking, tight and precise planning process. Young and chic, bold and confident (dancing swords and singing songs at banquets, being tight inside and loose outside when receiving Jiang Gan, laughing several times).