The root cause of international trade.

The main reasons for the emergence of international trade are as follows: First, the factors of production in different countries are different in Qin Bin. Due to natural, historical, social and cultural reasons, some countries have vast and fertile land, some countries have accumulated a lot of capital in international trade, some countries have rich human resources, and some countries have advanced technology. However, the proportion of factors needed to produce various products is different. Some products need intensive use of land, some products need intensive use of capital, some products need to use labor in large forums, and some products need to have high-tech meaning in international trade. Therefore, land-rich countries have advantages in producing land-intensive I products; Countries rich in capital and technology have advantages in developing capital and technology-intensive products; Labor-rich countries are labor-intensive in production Have an advantage in products. If countries participate in the international division of labor according to their respective comparative advantages, and then carry out trade, they can not only exchange needed goods and adjust surplus and deficiency, but also promote the effective utilization of production, increase the total amount of products and improve the welfare level of their own residents.

Second, the factors of production between countries lack liquidity. If the factors of production can flow freely between countries, it is possible to replace the trade of goods and services with the flow of factors of production. However. On the premise of a country's existence, due to natural, political and social reasons, the factors of production cannot flow freely between countries as they do within a country, so international trade needs international trade in goods and services to make up for the lack of flexibility in international production.