According to the traditional theory of international investment law, the main adjustment objects of international investment law are

Legal analysis: the basic system of international investment law.

as an important branch of international economic law, international investment law has its own system. There are mainly four kinds of legal norms. 1. The capital-importing countries adjust the legal norms of domestic and international private investment; 2. The laws and regulations of capital exporting countries on their overseas investment; 3. Bilateral investment agreements concluded between capital exporting countries and capital importing countries mainly include three forms: friendly ditto navigation treaty, investment guarantee agreement and investment promotion and protection agreement; 4. Multilateral investment conventions to adjust international private investment relations, including TPRM, MIGA and ICSID.

legal basis: foreign investment law of the people's Republic of China article 5 the state protects the investment, income and other legitimate rights and interests of foreign investors in China according to law.