The foreign exchange risk reserve is similar to the deposit reserve: when a bank collects and stores foreign exchange, it needs to deposit it in a special account designated by the central bank according to a certain proportion (originally 20%), and it cannot be used for other purposes to prepare for the occurrence of uncertain risks. Now the reserve ratio is adjusted to zero, which means that the foreign exchange in the hands of banks can be fully used without deposit. It means that the central bank's monetary policy is generous-it has achieved the effect of increasing the amount of money without increasing printing money, which is equivalent to increasing the amount of money and injecting new funds into the market.