Why did Xia, Shang and Zhou dynasties rule for so long? Xia dynasty was 45 1 year, Shang dynasty was 623 years, and Zhou dynasty was 8 15 years. What is the reason?

For the Xia Dynasty, we have not found any figures of that era in the current archaeological circles, only some city-state sites can be roughly measured by carbon 14, and the historical events at that time were only legends such as Dayu's flood control.

This document records the Shang Dynasty, but mainly divination. We can only know that today's historians regard the Shang Dynasty, which existed for more than 600 years, as the longest dynasty in China's history.

The Zhou Dynasty was divided into the Western Zhou Dynasty and the Eastern Zhou Dynasty, and also into the Spring and Autumn Period and the Warring States Period. By this spring and autumn period, the Zhou dynasty had actually existed in name only, so the history of the Zhou dynasty was only 276 years from 65438 BC to 0046 BC, not more than 800 years.