What were some of the accomplishments of shi huangdi during his rule?

The most important achievement under Qin Shihuang is the unification of China. After the Qin state conquered all others, ending the Warring States period, Qin Shihuang declared himself the first emperor—until that point, there had only been kings. With that, he founded the first Chinese dynasty.

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it further strained relations between the north and the south and convinced

it's not the readmission