Tóm tắt nội dung: Trade is the exchange activity of wealth, goods, services, knowledge, money, etc. between two or more partners, and can receive a certain value (in cash through the price) or by row goods and services such as in the form of barter trade (barter). In this process, vendors who provide the wealth and goods and services ... the buyer, the buyer in exchange for the seller to pay a certain equivalent value.