Time Travel 1937: Fighting the Japanese to Defend the Mountains and Rivers with Blood

My name is Li Jianwei. I am 28 years old. I am a retired noncommissioned officer of the Sharp Blade Special Forces in the Eastern Theater Command. I have served in special operations for eight years. After retiring, I worked as a volunteer docent at the Marco Polo Bridge Anti-Japanese War Memorial Hall. One day by chance, a geomagnetic anomaly occurred in the underground cultural relics warehouse of the memorial hall. I accidentally touched a piece of artillery shell left by the Japanese army in 1937, and the strong light swallowed my consciousness...