The United States was founded in the 1970s and 1980s. After Columbus discovered the New World, European colonists began to come to America. They slaughtered a large number of local indigenous Indians, and then slowly formed various federations. Later, a war broke out between the federations, that is, the American Civil War. Then a federal state was established. The history of the American continent before the founding of the United States was the history of Indians.

China is the only country in the world with thousands of years of uninterrupted civilization. The four ancient civilizations, namely, ancient Egypt, ancient Babylon, ancient India and ancient China, except China, the other three civilizations have either died out or degenerated intermittently, and the existing civilizations of Egypt and India have not been passed down to their ancient civilizations. . Only China is.