Current remittance purchase price/current banknote purchase price/selling price/benchmark price/BOC Conversion Price

The selling price is the card price that the bank sells foreign currency to the customer, that is, the card price when the customer purchases foreign currency from the bank. The purchase price is the card price when the bank buys foreign currency or foreign currency from the customer, it is divided into two types: Cash purchase price and cash purchase price. The current remittance purchase price is the card price when the bank buys the current currency, while the current banknote purchase price is the card price when the bank buys the foreign currency cash.
Cash Transfer and cash note are different concepts. They are two different forms of foreign currency stored in a bank. A banknote can be stored and taken out, but it can only be exchanged into a banknote. However, a banknote can be remitted to a foreign currency just like a remittance. A banknote cannot be exchanged into a cash exchange.
As to why it is different, it is because banks are at risk in the process of foreign exchange transactions, so they need to control the price difference and earn the service fee.
The spot price is the same as the spot price.
Central price = (current purchase price + current sale price)/2
The benchmark price is a medium price announced by the People's Bank of China. Other commercial banks can set their own purchase and sell prices based on the benchmark price according to the floating range specified by the People's Bank.
The central price is formed by the market, and the benchmark price is published by the People's Bank of China.