Qin Empire

Terracotta Army and The Lost City of China First Emperor showcase the foundation of small Qin State to became the Empire that united the entire China for the first time in history.

Empire
The Qin came to power in 221BC as one of the western states that existed during the Warring States Period. Its leaders conquered the other warring states and unified China for the first time.

First Emperor
A ruler, the First Emperor, or Qin Emperor Shihuang, was named inciting the long emperor tradition in China. The Qin, which was not the most culturally advanced of the Warring States, was the strongest in terms of military. The empire utilized many new technologies in warfare, especially the cavalry. The Qin is most likely where the name China originated.

Military Power
During its reign over China, the Qin create an imperial state unified by highly 
structured political power and a stable economy able to support a large 
military.

The Qin central government sought to minimize the role of aristocrats 
and landowners and have direct administrative control over the peasantry, who 
comprised the overwhelming majority of the population, and control over 
whom would grant the Qin access to a large labor force. This allowed for the 
construction of ambitious projects, such as a wall on the northern border, 
now  known as the Great Wall of China.

Economy
Qin dynasty introduced reforms that impact China for thousand of years.This includes currency, weights and measures
were standardized, uniform system of writing was established.