Let You Go Undercover and Become a Strategic Agent?

Yu Yan travels through a world fused with espionage and war. In this world there are Rebels, Peace Hotel, On the Cliff, Rouge, Pretender, Sparrow, Jingzhe, Feng Sheng... On the surface, he is a second lieutenant student in the special training class for military cadres, and is a classmate with Lin Nansheng and Zuo Qiuming. In fact, he is an agent of the secret front, codenamed "Abyss." At the beginning, he participated in Zheng Yaoxian's stand-in lurking plan and became a spy codenamed "Shadow" for the Southern Railway and "Ghost" for the military command, becoming a genuine three-faced spy. On the surface, he is cruel, greedy and lustful. Secretly, he is an omnipotent and feared strategic agent. Zheng Yaoxian: He is the most strategically valuable agent I have ever encountered. Anyone who is his enemy will be killed by him. Boss Dai: He actually left his political donations in the country to fight against Japan, and also let the Japanese Lieutenant General die unexpectedly? Yu Manli: Who is Mingtai? I only know Brother Yu... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.