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Answer:

Qin Shihuangdi's strategy helped China because, it increased the size of china. However, it also hurt China because it cost many lives, and he used harsh measures to maintain his power. ... Qin Shihuangdi replaced feudalism with a government he controlled. He did this so that powerful lords would not be a threat to him.

Explanation:

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Qin Shi Huangdi, the first Qin Emperor, was a brutal ruler who unified ancient China and laid the foundation for the Great Wall. China already had a long history by the time its states were unified under its first emperor. Settlements in the Yellow and Yangtze River Valleys had grown into an agricultural civilization.