The postal currency card transaction of the Exchange is a cultural property exchange approved by the financial management departments of people's governments at all levels and supervised by the "joint meeting system" led by the CSRC, which specializes in the listing, trading and settlement of cultural collections such as coins, stamps and magnetic cards. The exchange's postal currency card trading is based on spot custody, with client trading software as the trading platform and the Internet as the link to realize online trading for registered members. It is an epoch-making revolution to implement national policies and support cultural industries with finance, and it is also a brand-new investment and financial management field after stocks, futures and precious metals.

The above is the official statement.

Let me put it simply, that is, everyone is speculating stamps on a platform, and a few people earn most people's money. The rich make money from the poor.

You need to be careful when you go in. I don't know why you keep asking.