Something is needed to prove the existence of history, such as archaeological discoveries. Although China claims to be an ancient civilization with a history of 5,000 years, the exact date began in 84 BC1year, and the previous history lacks sufficient evidence to support it. Therefore, the real civilization in China is strictly less than 3,000 years old. The so-called 5,000-year civilization is just a kind of narcissism, which is not recognized by the world.

One thing is certain, China is an ancient civilization, even if it has a history of more than 2,000 years, it is still very early. Chinese civilization is the last of the four ancient civilizations.

The ancient Greek civilization probably began around 800 BC, and was later cut off (it can also be said that it was a continuation of ancient Rome).

Egyptian civilization began around 4000 BC and was later cut off.

As for the United States, the declaration of independence of 1776 marked its establishment.

As for Japan, I don't know much. It should be more than 2,000 years since Emperor Jimmu (660 BC). But the situation in Japan is similar to that in China, and there is not much evidence to support it. Up to now, some people even doubt the existence of Emperor Yoshiki.