Twin System: Ten Thousand Times Purchasing Power

I have a system where I can buy something worth 10,000 yuan for one dollar, but my good brother's system is just the opposite. I can make 10,000 yuan if I sell something for one dollar! After I met a good brother, I wanted to do some small business through the system. I would buy and he would sell. As a result, the aliens came, and all humans got the game panel, and they relied on the panel to defeat the aliens to survive. Looking at the system panels that my brother and I have more than others, I smiled - maxing out the game store and letting other players see how to cure the phobia of insufficient firepower! It was not until later that we discovered that every piece of wool we collected had to be returned. "Whatever is borrowed must be credited, and what is borrowed must be equal."