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1. The difference between visa card and UnionPay card Visa, MasterCard and UnionPay all refer to card organizations. Abroad, VISA and MasterCard are the most popular. Users can understand payment methods such as WeChat payment, Alipay payment, UnionPay China UnionPay Express, etc. Cards issued by the corresponding card organization can only be swiped for consumption on supported machines (online shopping generally supports multiple card types of payment, although ordinary machines support two or three card types of payment).

2. Overdraft card PIN code maintenance method Leaking the overdraft card PIN code is equivalent to revealing the login password. Credit card thieves only need to know the card number and PIN code to steal credit cards thousands of miles away. So, how to prevent your overdraft card PIN number from being leaked? First of all, when you swipe your card outside, be careful not to look at the overdraft card PIN number casually. If you are worried about the PIN code being leaked, you can use tape to block the PIN code. Secondly, if the credit card PIN is used for online transactions, remember to delete the credit card information automatically saved on the website. To sum up, when applying for a VISA card, you can only spend money on machines that support VISA merchants (VISA, MasterCard, JCB, and AE are widely supported abroad, and UnionPay is working hard to support more and more). In general, most domestic machines only support UnionPay card payment. Once you realize that your overdraft card PIN is at risk of being leaked, you can actively contact the issuing bank to replace the card to prevent damage.

VISA, also translated as Visa, is a credit card brand operated and managed by Visa International Organization located in San Francisco, California, USA. VISA card began to be issued in 1976. Its predecessor was Bank Americard issued by Bank of America. In June 2017, the "BrandZ Top 100 Most Valuable Brands in the World 2017" was announced, with Visa ranking 7th with a brand value of US$110.999 billion. On May 29, 2018, the "BrandZ Top 100 Most Valuable Brands in the World 2018" was released, with VISA ranking 7th. In December 2018, VISA was shortlisted for the 2018 Top 500 World Brands. In October 2019, Interbrand ranked 55th on the Top 100 Global Brands list. On October 23, 2019, the 2019 Fortune Future 50 list was announced, and Visa ranked 43rd. On January 13, 2020, it was selected into the 2020 Hurun List of top quality products winners.