Hmm! Support the third floor! Zhang Run Jianxing dual-currency credit card is good for you. It's best to get a dual-currency credit card of UnionPay and VISA. Try not to run for a master's degree. Visa is easier to use now, but just in case, you can also get a dual-currency card of UnionPay and MasterCard. Anyway, you can get rid of the annual fee as long as you brush it three times. If you study in the United States, the routes of visa and master will be directly credited to your US dollar account, which is very good. There will be no extra remittance fee. It is very suitable for you to deposit directly in US dollars, or deposit the full amount of RMB on the same day, or call to purchase foreign exchange for repayment on the same day. As said on the third floor, you can also apply for a supplementary card, but all your accounts can only be checked with the supplementary card, which is limited to some extent, and the use of the quota is also limited. But it's convenient to pay you back if your parents are in China, hehe.