600 yuan is safe, usually won't exceed 5000, and most of the time it's hard to establish an account. Small merchants are too lazy to provide you with transaction records. Whether the payment is real-name can be requested to provide transfer payment proof before releasing the coins. If you don’t know how, go find it in the bottom left corner of the bill. Basically, no one cares about such small amounts, I'm saying that Ma Bianzi doesn't care.