Qin dynasty, economic, political, people's livelihood and military reform. Caused a counterattack from the nobles of the former six countries. However, the original population of the Qin Dynasty collapsed because of the war and the resistance to Xiongnu and the southward expedition to Fujian and Vietnam, and could not resist the anti-Qin alliance.
The Sui Dynasty changed the aristocratic gate system into a bureaucratic system, unified the customs and habits of Xianbei and Han people, and reformed national integration. Because of the rebellion of Xianbei family, it did not have the support of Jiangnan Han family, and eventually perished.
Wu Zhou suppressed the aristocratic family and completely transformed it into a bureaucratic system. After young bureaucrats ate aristocratic politics, they inflated excessively and ate their own masters, leading to a coup d' é tat and the death of Wu Zhou.
Longevity dynasty:
Han dynasty: disguised as an anti-Qin alliance, won the fruits of victory. After the founding of the People's Republic of China, the original aristocratic system in the six countries was eliminated with the emerging nobles. Inherit the Qin system. To put it bluntly, it is the revolutionary period from Qin to Han. The new political pattern is emperor+consorts+titles.
Tang Dynasty: Eat purely the bonus of Yang family. The Sui Dynasty carried out national integration and established the embryonic form of bureaucracy, which was established by Wu Zetian, the daughter of Yang Guang, and opened the Silk Road in the Sui Dynasty. ...
Song dynasty: there was no redistribution of land at all ... wealth from all over the country gathered in the capital, and strong and weak branches led to constant rebellion, but they were unable to overthrow the song dynasty ...
Ming dynasty: relying on the poor to build the country and safeguard the interests of the poor, but the whole Ming dynasty was in the Little Ice Age, and in order to improve business prosperity, business tax was not charged. In the end, the financial collapse and the peasants rebelled.
Qing Dynasty: There were many revolutions in Qing Dynasty. Fire consumption returned to the public, officials and gentry served in one unit, and grain was collected in one unit, such as land reform, Mongolian flag system, Tibet charter system, and later Westernization Movement. So many revolutions, incredible longevity ... I don't understand, it's hard to say.