This is one of the main characters portrayed in the novel. As an underground fighter for a long time, he showed great political sensitivity from the moment he appeared. He bought a set of toiletries in his bedroom Shaping Bookstore, and saw Zheng's plagiarized poems and changes in the bookstore. He was keenly uneasy and dangerous, and decided to cancel this liaison station, transfer personnel, and stop holding the district Committee meeting. When Zhigao Pu defected and led the spy to suddenly appear in the tea garden, Xu Yunfeng stepped forward to meet the traitor in order to cover Li Jingyuan, secretary of the municipal party committee, showing the heroic spirit of taking the tail from wagging the dog and going through fire and water. The struggle in prison highlighted his lightning-like steel personality. In the first trial, facing the reserved and arrogant Xu Pengfei, he was calm and saw through that such people always overestimated their own strength and were full of self-expression desire and lucky thoughts. The class instinct of this kind of person forced him to show his stupidity and made him eager to reveal the materials he had obtained. His steely determination and thunderous counterattack left Xu Pengfei at a loss and in a passive position. Xu Yunfeng led the leadership responsibility and the superior-subordinate relationship with config-ext-QQ to himself, led the enemy to the wrong judgment path, protected the organization and comrades, and decided to take the responsibility with the greatest sacrifice. At a critical juncture, it shows the proper performance and noble character of an underground party. At the banquet of wine and meat carefully arranged by the enemy, all the spy chiefs from Mao Renfeng to the Southwest Special Economic Zone were dispatched. Facing Xu Yunfeng, who is single and unarmed, the enemy can't even get a photo for political deception, but it also provides a political platform for Xu Yunfeng. Mao Renfeng and Xu Pengfei failed to draw a tiger and fell into an extremely embarrassing state. Their fantasy of squeezing oil and water out of Xu Yunfeng fell through. On the one hand, Xu Yunfeng was as quick as lightning in front of the enemy. On the other hand, whether in a separate cell in Zhazidong or in the dark dungeon of Baigongguan, he will never take personal actions beyond the needs of the overall struggle, which can better reflect the character of a leader. With strong perseverance, he dug through the stone wall of the dungeon with his fingers and prepared an escape route for the prisoners in the whole prison, but he never used it himself. The last time I met Xu Pengfei in the subway, I completed Xu Yunfeng's steel-like lightning personality. In stark contrast to the helpless cry of the enemy under the control of defeat, Xu Yunfeng, as the winner of an important task, ordered in front of him with a clear voice of a spy: "Go! Lead the way! " This role shines with unique brilliance.