Most banks can provide foreign currency exchange services, but the specific convertible currency and quota may vary from bank to bank. The following are some suggested banks, but please note that the actual situation may be different according to different countries, regions and banking policies:

1. Bank of China: China Bank can usually provide a wide range of foreign currency exchanges and a large exchange quota.

2. China Industrial and Commercial Bank: China Industrial and Commercial Bank also has many branches in China, providing foreign currency exchange services.

3. China Construction Bank: China Construction Bank also provides foreign currency exchange services, but the specific convertible currencies and quotas may need to be consulted with local branches.

4. Agricultural Bank: Agricultural Bank also provides foreign currency exchange services, and local branches may need to be consulted for details.

Please note that foreign currency exchange usually requires an appointment in advance, and you may need to bring relevant identification documents. At the same time, the foreign currency exchange rate may be affected by exchange rate fluctuations, so it is recommended to know the latest exchange rate information before exchange.

When exchanging foreign currency, it is recommended to choose a large-scale and reputable bank to ensure the safety and smoothness of the exchange process. At the same time, in the process of exchange, we must pay attention to the authenticity and exchange rate of foreign currency to prevent potential risks.