After registering the advance payment contract and withdrawal on the online application service platform of the State Administration of Foreign Exchange, check whether there is a foreign exchange receipt quota at the advance payment office of the electronic port within 48 hours, and register the foreign exchange receipt at the electronic port as normal. Apply for cancellation of registration on the online service platform of the State Administration of Foreign Exchange within 15 days after the goods are exported. Failure to cancel the registration on time may affect the approval of the advance payment amount in the future. The following operation is the same as normal operation. After checking out, go to the bank and the safe for verification in turn.