Hong Kong Citibank credit card is official. Because Citibank in Hong Kong has a business license, is a nationally recognized bank, and is a legal company with complete qualifications and legal protection. It is very formal. Citibank is a relatively unpopular commercial bank. The credit card limit it introduces is very high, but the threshold for passing it is also very formal. It is relatively high and it is a bit difficult to apply. So Hong Kong Citibank credit card is legal. Credit cards refer to various media that record cardholder account information, have bank credit lines and overdraft functions, and provide cardholders with related banking services.