After Traveling Through Time, I Chose to Be the Best Gangster in the World.

Liu Xiamu, who was going to college the next day, discovered that the small bracelet he had worn since childhood was actually a small world. I was about to go in and investigate when I heard a ding saying that I am also bound to the world assistant system? And accidentally became a bandit boss? From then on, Liu Xiamu determined to become the world's most violent gangster and maintain world peace. I have a system. Buying some guns and ammunition is very cool! I have high authority, don't you suggest buying some planes and tanks? The territory is too big to maintain law and order. Can I buy a few sets of mechas? Watch me use the power of technology and my superb talent to fight against the world of martial arts! As the population increases, can I build a few factories and train some assembly line workers? When he became the overlord of a different world, he was planning to retire on earth, but found that the water on earth was very deep... And his sister doesn't seem to be simple either... The truth of the world is also emerging...