There are three people in the game. Who is the traitor?

Guo Liansheng, the three people in the game, is a traitor. In Insider, Shen Fang wrote three letters in the form of confidential letters to Zhou Dayuan, Guo Liansheng and Qian Biliang, saying that the organization had taken action to help book hotels, but everyone was responsible for different places. In the evening, Shen Fang took his brothers to Xilemen, and asked Xiao Jiang to reveal these three places to his classmates and pay attention to the actions of the central authorities. When Shen Fang got the news, Zhong Tong made a surprise inspection of the hotel. The corresponding hotel happened to be the place where Guo Liansheng was responsible, and the other two places were all right. Shen Fang identified the traitor as Guo Liansheng. After Shen Fang determined that Guo Liansheng was a traitor, he designed a good play: killing people with a knife. Borrowed Luo Lizhong's knife and killed the traitor Guo Liansheng. The Man in the Bureau is a spy war drama jointly produced by Jiangsu Straw Bear Film Co., Ltd., Shanghai Orange Core Film Media Co., Ltd. and Tianjin Cat's Eye Film Co., Ltd., directed and written by Liu Yu, starring Zray and Pan Yueming, and starring Wang Ruizi, Faye and Zhao Da. The play mainly tells that Lin Shen and Shen Fang originally belonged to different revolutionary camps, but in the end they fought side by side because of the same belief and joined the revolutionary wave.