From the form of foreign exchange, the first is foreign currency cash, and the second is foreign currency cash. Foreign currency cash and foreign currency cash are not equivalent. Foreign currency cash mainly refers to freely convertible foreign currency brought from abroad or held by individuals, and simply refers to foreign banknotes held by individuals, such as US dollars, Japanese yen and British pounds. Foreign currency cash refers to foreign currency bills and vouchers remitted from abroad or brought in or sent in from abroad. In our daily life, we often come into contact with overseas remittances and traveler's checks.

Renminbi is the legal tender in China, and foreign currency cash cannot be used as a means of payment in China. When banks need to pay for packaging, transportation, insurance and other expenses, cash is regarded as foreign exchange on the books, and it only needs to be transferred on the books when it is transferred out of the country. Therefore, in the foreign exchange quotation published by the bank, cash and cash are not equivalent, and the buying price of cash is lower than cash. When the foreign exchange account and the foreign currency cash account withdraw cash in the same currency, they are both withdrawn according to 1: 1; When foreign bank accounts are converted into foreign exchange accounts, banks will charge a certain percentage of handling fees.

On 1996, China promulgated the Regulations on Foreign Exchange Management, in which Article 3 stipulated the specific contents of foreign exchange, including:

(1) foreign currency, including banknotes and coins.

(2) Foreign currency payment vouchers, including bills, bank payment vouchers, postal savings vouchers, etc.

(3) Foreign currency securities, including government bonds, corporate bonds and stocks.

(4) Special Drawing Rights and European Monetary Units.

(5) Other foreign currency assets.