Non-tariff barriers can be divided into direct and indirect categories. The former is that the importing country directly restricts the quantity or amount of imported goods or forces the exporting country to directly restrict exports; The latter is to strictly arbitrage goods and indirectly restrict the import of goods.

Chapter A deals between Party A and Party B, the price is the buyer, Party B is the seller, and the loan provided by Party A's bank to Party B or Party B's bank is the buyer's credit; If the bank in the country where Party A is located provides loans to Party A, it is the seller's credit. Commodity dumping refers to the act of selling imported goods to another country at a price lower than the normal value. Foreign exchange dumping refers to the behavior of exporters to occupy the international market by depreciating their own currencies. Under the condition that the local currency depreciates, the price of domestic export commodities expressed in foreign currency drops, and under the condition that the price elasticity of foreign markets to domestic exporters is high, the price drop will lead to a large increase in the demand for domestic export commodities, thus increasing export income.