First Dynasty, China is United.
A golden age for a united China.
China was going through a tough time with chaos.
China came back together.
During the Tang, there was many new inventions. Most emperors were Aristocrats, because of their wealth.
It was a time of chaos.
Economy grew, and there were many inventions.
The foreign Mongols overtook China. They only allowed few Chinese in the government.
Civil service system was restored. Innovation not encouraged.