Li Zihang's real identity is the meticulous platoon leader of the Eighth Route Army Secret Service Company. He is a figure with a dual identity, disguised as a cynical and idle rich boy.
In the 23rd episode, when Li Zihang came home, his wife Zhang Jingqiu asked him about going to the American Consulate with Li Zimu, but Li Zihang gave him the runaround. As soon as Shuang Ling entered the contact point of the underground party, she was surprised to find Li See Zimu, who told her that her real identity was the reconnaissance platoon leader of the Eighth Route Army.
Li Zixing confessed his identity to his brother:
In the finale, Li Zimu came home and took advantage of Fang Yi's absence to thank Li Zihang for his help. However, Li Zihang gave a signal when he turned back to his room. Li Zimu looked back at his familiar and unfamiliar eldest brother. At this time, he knew that Li Zihang was the mysterious underground party organization in Shanghai and Shanghai.
Li Zihang arranged the next task for him and told him that Wei Ping and Zhang Jingqiu were one of them. Li Zimu was pleasantly surprised.