The postal service in the postal currency card is a stamp. Coins are commemorative coins, ancient coins and currencies that have been withdrawn from circulation (buying and selling currencies that have not been withdrawn from circulation is prohibited by law). Card refers to a set of meaningful or complete calling cards and other card products. The coverage of cards is very wide, and there are many kinds of collecting phone cards.
Postal currency card market refers to the market where postal services, currency and cards are bought and sold within a certain range. But generally it includes not only these, but also a certain number of other collections.
In the general postal currency card market, stamp products, coins and cards are bought and sold by stalls. Some Tibetan friends also barter things.