From the Start, I'm a General's Son: Brother, Am I Just Too Lucky?

Su Bei wakes up in another world, having transmigrated into the son of a warlord in an era of civil war and rampant foreign powers. As the governor's only son, he thought his moment of glory had finally arrived. But when he opens his eyes, he's in a dark, lightless cell, with a live gun pressed to his forehead and a smug-looking Japanese man ordering him to obey. A flood of memories surges into his mind. Su Bei knows the enemy is using him to force his father to sign a treasonous treaty. He also knows he can't just sit back and wait to die. But how can an unarmed rich kid turn the tables against enemies armed with real guns? Then he hears a single "Ding," and his heart settles. Years later, the tables have turned. The treaty is placed in the Japanese hands, and as they stare at the document, over a meter tall, they regret everything.