Generally, currency is used as much as possible, that is, the so-called "currency" or "strong currency", and its exchange rate is relatively stable and tends to rise during the period from transaction to foreign exchange collection. On the contrary, in the import business, during the period from transaction to payment, we should try to use more currencies with weak exchange rate and a downward trend, that is, the so-called "soft currency" or "weak currency".

In import and export trade, in order to prevent foreign exchange risks, the correct methods to choose the currency for pricing and settlement are as follows: in export trade, "coins" or currencies with floating trend should be selected as the pricing currency; In import trade, we should choose "soft currency" or a currency with a downward trend as the pricing currency.