What are the basic characteristics of Keynes's international trade theory?

Super-protective trade policy policy

An offensive foreign trade policy adopted by imperialist countries to maintain monopoly high prices in the domestic market and seize foreign markets. The main measures are to implement stricter licensing system and foreign exchange control for import and export trade, such as setting import quotas for imported goods, imposing high import tariffs or prohibiting imports, and subsidizing or reducing tariffs for export goods. Super-protective trade policy is different from protecting trade, not limited to protecting domestic industrial and agricultural production, but protecting the interests of highly developed monopoly groups; It is not defensive to protect the domestic market, but offensive to seize foreign markets and achieve economic expansion.