Most banks can open foreign currency savings accounts, including US dollars. However, this kind of savings account cannot be settled in consumption abroad, but only in China, and there are strict foreign exchange control measures. If you need to spend abroad, you can apply for a dual-currency credit card from the bank.
Foreign exchange banks play the role of organizing and creating the foreign exchange market. Foreign exchange banks are usually commercial banks, which can be domestic banks specializing in foreign exchange, domestic banks concurrently engaged in foreign exchange business or branches of foreign banks in their own countries. Foreign exchange banks are the most important participants in the foreign exchange market, and their foreign exchange transactions constitute the main part of foreign exchange market activities.