There are two signs of exchange rate, take the US dollar as an example.
USD/RMB =6.3, then RMB/USD = 1/6.3.
That is, RMB exchange = RMB * RMB/USD.
Also, RMB exchange = RMB/(USD/RMB)
In our country, it is generally marked with USD/RMB, and RMB exchange = RMB/(USD/RMB).