System: the World's Richest Man, I'm Just a Farmer

After accidentally downloading a game, Lu Yongnian obtained a system that allowed him to enter the game and bring out the contents of the game. With this system, why not make money? It's hard to get going in the game, and you can't do anything without money. Farming, fighting, and upgrading, using this system, Lu Yongnian gradually became the richest man in the world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.