Answer:
Ancient China was part of the trade from the silk route and the rivers. The presence of mountains, rivers, and deserts created the barrier that preserved Chinese culture from the external world.
Step-by-step explanation:
The Han dynasty was the largest and long-lived dynasty of the Chinese subcontinent. The dynasty was founded by Liu Bang in 206 BCE.
The Chinese culture in the dynasty was preserved for a long, as the region had been covered with mountains and deserts. It enabled the direct contact of China with the external world and limits cultural dilution.