How far did the slik road extend

about 4,000 miles or 6,400 km

Explanation:

The Silk Road began in north-central China in Xi'an (in modern Shaanxi province). A caravan track stretched west along the Great Wall of China, across the Pamirs, through Afghanistan, and into the Levant and Anatolia.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity