The cable fee reimburses the bank fee. The small bill commission is about the cost of a letter of credit below 10000. Collection bill commission document processing fee CIE: there is no exchange fee for the exchange commission. According to the usual ideas and practices of banks in various countries, the difference between foreign exchange buying and selling in international settlement is part of the fee income of bank settlement business. Banks that have not bought or sold foreign exchange (referring to the original currency account) in international settlement shall charge non-exchange handling fees accordingly. Banks live on various charges, so they won't provide free services. If there is exchange between currencies, banks can make money (for example, by exchanging the difference), otherwise, they need to charge this related fee. As for the specific calculation method, hey hey, ask the account manager.