Lin Feng, a modern special soldier, accidentally traveled back to the parallel world of Shanghai in 1937 before the Battle of Songhu. Relying on his precognition of history and military skills, he purchased German equipment through underground channels and formed the "Iron-Blooded National Salvation Army." With the assistance of the underground party of the Communist Party of China, patriotic businessmen and international forces, he participated in the Shanghai Anti-Japanese War, fought deep behind enemy lines, and eventually led the armed forces to counterattack the Japanese mainland. The story combines real historical events and artistic fiction, showing the choices and growth of ordinary people in the tide of the times. PS: This novel is a historical fictional novel, not in this time and space. Any similarities are purely coincidental.