1. Protagonist: Ling Feng (can be customized), a former retired officer/non-commissioned officer of a special force of the Chinese People's Liberation Army. He has excellent military skills (shooting, combat, reconnaissance, demolition, tactical command, field survival, etc.). He is familiar with modern military history and equipment knowledge, but he is not omniscient and omnipotent. Travel due to accidents (such as rescue and disaster relief, experimental accidents, etc.).
2. Time point: Traveling back to around 1937-1938, the early days of the Anti-Japanese War, which roughly coincides with the development period of the Li Yunlong Independent Regiment.
