4. Why does Li Si call this the "one moment in ten thousand ages"? Was he correct? Is China still unified instead of multiple kingdoms after
two thousand years?

he impacted the society ith his knowwdge and advance our research by years to come

(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