War Against Japan: I’m Having a Blast Behind Enemy Lines

The Protagonist Transmigrates From the Modern Era to the War of Resistance Era, Is a Bandit's Son, and Has a System

I'm looking for books like The Blood-Drenched Jungle of the War of Resistance. The protagonist transmigrates from modern times to the era of the war against Japan and has a System. Its function is to award merit points for killing Japanese officers, which he can use to buy equipment. He's the son of a bandit, and from the start he's setting out to save his father.