what did Qin shi huang do for china

Qin Shi Huang reformed politics, economy and culture. In politics, he abolished the hereditary vassal enfeoffment system and established prefectures and counties, ruled directly by the emperor. Based on the original rules of the Qin State, the emperor adopted some regulations of other rival states to form a workable law of the Qin Dynasty. In economy, he claimed that both the agriculture and commerce were very important. Besides, tax system began to function and coinage and metrology were all standardized. In culture, the emperor unified the Chinese characters in writing.
These are all I know about him.

He ended the warship at that time and established the first feudal dynasty, Qin. This applies to the tendency of history. Besides, he united the country and standardizes the currency, character, measurement, which attaches great importance to the development of economy and politics. Old china marched forward a huge step for his ambition. Of course, he linked the great wall, which left people a great wonder.