The transaction postscript should be filled in according to the Chinese description corresponding to the transaction code, described in a fixed format required by the foreign exchange bureau and filled in according to the matters notified by the bank. The transaction postscript is used to indicate the purpose of transfer and remittance. The postscript of ordinary transfer remittance transaction is optional, and it is required when it involves import and export transactions and overseas remittance. And the content is strict, and the general bank will inform you.