One day Qin Shi'an received a courier, which contained a coin. Logically speaking, coins have two sides, but the one in his hand happened to be the same on both sides. What's even more puzzling is that his front and back sides are actually changing! ! The only thing that remains unchanged is the coin's number 1-1-0001
Qin Shi'an: "Interesting coins will definitely fetch a lot of money if you put them up for auction~"
Feng Jue: "If you have nothing to do, just go shopping at a certain treasure."
Coin: OK, OK, after paying so much, the end result is actually being sold.
Intention: Infinite flow, strong, write casually