It is credit card information, the data stored in the magnetic strip. You can use a card writer to write the information into an empty card and cash it out. You can also use the card material to swipe things online. Generally, in Japan, you can swipe the information online. , South Korea has a lot of card materials. Nowadays, there are too many fake card materials online, and there are more waste materials. People who are not very familiar with them generally will not give you real first-hand materials. There are gunmen in mainland China who can help you remove the finished cards. Shopping for things in external stores is very profitable but it is illegal. Don’t try this casually. If you are interested in learning about this, you can give me a call: 15900495410. Send me a text message (card material) first and then call me. Thank you!