Episode 39 of the finale.
When Chen Jiaying was arrested by Dou Shixiao, Dou Shixiao knocked out the password in his hand, which made Chen Jiaying immediately think that Dou Shixiao was one of his own.
Peace Hotel is a spy war mystery drama, directed by He and starring zhangyan, Chen Guanning, Yan Junjie and Wang Yuexi.