看這個, 45:50開始
https://bbs.wenxuecity.com/znjy/6122591.html
KEY TAKEAWAYS
- Visa and Mastercard are the two largest payment processing networks in the world.
- Visa and Mastercard do not issue cards directly to the public, as Discover and American Express do, but rather through member financial institutions.
- Member banks and credit unions issue Visa and Mastercard credit and debit cards directly to their customers and, in many cases, through co-branded credit card partnerships with airlines, hotels, and national retailers.