This section summarizes the basic concepts, underlying frameworks, and models of international e-commerce. International e-commerce refers to the process of cross-border transactions facilitated by the Internet and digital technology. It involves key production factors such as information flow, capital flow, and logistics, as well as supporting elements like security, standardization, and regulatory policies. Some of the more classical theories include the comparative advantage theory, global value chain theory, and platform economy theory. Understanding these concepts is of significant importance for driving the development of international e-commerce.