SSS Class Necromancer - Chapter 14: Second mission: Corrupted Heroes 6

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

200 years after the world has ended, the laws of society have long been forgotten.

There are three good things about Master Mu: good marksmanship, good skills, and good wives!

For Chen Cheng, thirty means interest—the interest rate.From 3,000, to 100,000, to a million, to ten million, and then to over a hundred million...An ever-increasing amount of principal, an endless stream of interest.With money generating money, compounded interest calculations made Chen Cheng exclaim:This money can't be spent! Absolutely can't be spent! For a lifetime, I can't finish spending it!