I'm a Coal Tycoon, but I Accidentally Became the King of Northern Tomb Raiders

I was a coal boss who clawed his way up from the bottom. Then, in an accident, a coal mine collapsed and I died. But I didn't stay dead. I transmigrated to the Republic of China era and became a miner at the very bottom of society, treated worse than a beast of burden. With no other choice, I turned to tomb-robbing. I had no experience as a tomb raider, but I knew how to mine. Digging tunnels, setting explosives: I was good at it all. I went from a complete beginner to an expert in the trade, experiencing strange and wondrous adventures along the way and gradually rising to become the foremost tomb raider. But then the Japanese invaders came. Every inch of our land was drenched in blood, and I...