The reasons for the unsynchronized relationship between London Bank and domestic banks are: the margin ratio of London Bank is less than 1%, and that of spot bank is 2.5%. London silver is a spot transaction, and silver is a transaction. London silver is an international spot trading market, silver is a domestic transaction, London silver is an international 24-hour trading market and a domestic securities regulatory agency. The nature of the platform is different, silver belongs to the platform, and London silver is now in stock. There are many contracts according to the delivery month, while the Bank of London has only one contract. Spot silver and London silver are the same product. Domestic spot silver is converted according to the price of London silver, which is the domestic name.