Final answer:
According to the world systems theory, both China and India belong to the category of international systems.
Step-by-step explanation:
According to the world systems theory, both China and India can be categorized as international systems. In the case of China, it was historically a dominant country in East Asia, with an international system organized around the Chinese empire. China acted as the center, while other smaller political entities revolved around it. Similarly, India is also considered an international system due to its long history of political diversity, separate religions, and competing states. It has been a land of various ethnic groups, languages, and religions, with periods of unity and periods of separate states.