1. The forms of capital involved in international investment activities are diverse. It includes capital in the form of physical capital, such as machinery and equipment, goods, etc., as well as capital in the form of intangible assets, such as trademarks, patents, management technology, intelligence information, production know-how, etc; There are also capital in the form of financial assets, such as bonds, stocks, derivative securities, etc.

2. The participants in international investment activities are diverse. Investment entities refer to legal or natural persons who independently exercise decision-making power and assume corresponding responsibilities for external investment activities, including official and unofficial institutions, multinational corporations, multinational financial institutions, and resident individual investors. Multinational corporations and banks are the main players among them.

3. International investment activities are cross-border operations of capital. This is different from both international trade and pure international credit activities. International trade mainly refers to the international circulation and exchange of goods, realizing the value of goods; International credit mainly refers to the lending and recovery of currency. Although its purpose is also to achieve the value appreciation of capital, the owner of capital has no control over its specific operation process; International investment activities, on the other hand, are a combination of various capital operations, achieving capital appreciation through operations.