Once you travel through time, you will return to the era of the Anti-Japanese War when the mountains and rivers were shattered.
Lin Rui unexpectedly awakens the enemy-killing upgrade system: Killing Japs gets energy points, which can strengthen his own strength, agility, firearms, and bomb delivery, and can also increase the combat power of his men in batches.
Poor equipment? Use the system heap!
Heavy casualties? Crush with strength!
He led a group of hot-blooded men to fight their way out of the mountains of corpses and seas of blood, from the battlefield behind enemy lines to the frontal defense line, showing the majesty of a Chinese soldier.
An inch of mountains and rivers, an inch of blood, I should guard my mountains and rivers for thousands of miles with a gun in my hand!