If international remittance is made frequently, this kind of refund is often encountered, or the payee receives the money late. Overseas banks such as UBS, HSBC, Standard Chartered and Bank of China have all encountered it ... The best way is to call, which is more efficient than asking the payee or remitter. Both banks have to call for documents, and read some figures/figures/amounts on the documents to the bank staff, which is convenient for the bank staff to find and efficient. If you feel that there is no information in about three days, just call and you will get the result the next day. I didn't wait.