Metropolis: Spend Money and Get Cash Back

He Tian travels through a parallel world. This is a world filled with materialistic desires. If you have money, you are a master, and if you have money, you are awesome. As a poor KTV security guard, he gets a god-level cash back system, which means that no matter how much money he uses, he will get double the money back. "Ding! Congratulations to the host for spending 600 yuan to pay for beer and get 1,200 yuan in cash back." "Ding, congratulations to the host for rewarding the anchor 200,000 yuan and giving back 400,000 yuan in cash!" "Ding! Congratulations to the host for purchasing a luxury community. You paid 3 million yuan and received 6 million yuan in cash back." … Make him 100 million first? The world's richest man? Isn't this a small goal? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.