Is it better to exchange foreign exchange at home or after going abroad for outbound travel? Which is more favorable? Do I need to bring a credit card?

I don't know which country you are going to. It is best to exchange foreign exchange at home before going abroad for outbound travel. At present, in China, US dollars, euros, Japanese yen and Korean won are easy to exchange, but it is difficult to exchange Australian dollars, New Zealand dollars and Canadian dollars. So when you go to Australia, New Zealand and Canada, you should take some US dollars in cash first, and then change them into cash from these countries at the airport when you get there. If you go to Southeast Asian countries, you can bring RMB directly, and then go to local countries and exchange RMB for local currency. This is more convenient. In addition, you can bring a credit card. Credit cards must be dual-currency, with the logo of VISA or MASTER card, which is convenient for swiping credit cards locally. In addition, many countries in Japan, South Korea, Europe, Canada, the United States, and Southeast Asia also accept China's UnionPay card to swipe or withdraw cash. Besides your credit card, you'd better bring a UnionPay card from China. You can withdraw cash directly from the local ATM that accepts UnionPay cards.