2. The provincial system implemented in Yuan Dynasty was inherited.

The flag system of Qing Dynasty was inherited.

4. The highly developed economy in Tang Dynasty had a far-reaching impact on modern times.

China's four great inventions have great influence on modern printing, papermaking, navigation and military affairs.

6. China has a long history and legendary historical origins. Known as one of the four ancient civilizations, it is also the only ancient country that exists and develops.