In China, basically every bank has an international business department, that is, basically every bank can open a letter of credit. At present, I just haven't heard that rural credit cooperatives can open, hehe. As for why so many foreign customers use China banks to open letters of credit, it is because there are banks in China in their country, which is convenient for foreign customers (basically it will not be questioned by domestic manufacturers, and the credit is ok, and the operation is closer to China, which is more acceptable to Chinese people), and it can also save a lot of expenses, hehe.