Introduction：In 1948, after the publication of the May Day slogan, a group of patriotic and democratic figures in Hong Kong, represented by Professor Tong Jiangnan, actively responded to the call of the Communist Party and prepared to return to the liberated areas. The reactionary faction of the KuomintangBy imposing obstruction and destruction, they dispatched spies such as Luo Guanying to impersonate the Communist Party and attempt to lure democratic figures such as Professor Tong. Our party's underground worker Su Xing received a mission to rush to Hong Kong to exhibit with the Kuomintang's secret agentsA life and death battle took place. As soon as Su Xing arrived in Hong Kong, the enemy killed Tu Zhe, the deputy editor in chief of Ta Kung Pao who recommended him to meet Professor Tong, which caused great difficulties for his work. In order to obtain Professor Tong's information as soon as possibleTrust, Su Xing started by investigating the murderer of Tu Zhe and dug up the direct contact person of Luo Guanying, Dang Xunqi. He discovered the hidden spy "Bee" and prevented the Nationalist Party from taking Professor Tong out of Hong Kong