Final answer:
China and India are classified as middle-income nations due to their significant economic growth over the past few decades.
Step-by-step explanation:
China and India's Income Classification
China and India are both classified as middle-income nations. In terms of economic growth, both countries have experienced significant development over the past few decades. India, for example, has had one of the fastest-growing economies in the world. However, despite this growth, both countries still face challenges such as poverty and income inequality.