When did Qin Shihuang unify the world?

Qin Shihuang succeeded to the throne at the age of thirteen, and took charge at the age of twenty-one.

Ying Zheng was born in Handan, the capital of Zhao, and then returned to Qin. In the first 247 years, he became king at the age of 13. In the first 238 years, Lao Ai's rebellion was suppressed, and then Lv Buwei, the powerful minister, was removed and he began to monopolize the government.

Li Si, Wang Jian and others were heavily used. From the first 23 years to the first 221 years, the six countries of Korea, Zhao, Wei, Chu, Yan and Qi were destroyed successively, which completed the great cause of reunifying China and established a centralized and unified multi-ethnic country-the Qin Dynasty.

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before Qin Shihuang unified the six countries, he noticed the rule of ethnic minorities in southwest, southeast and northwest regions, thus strengthening the political and cultural relations of a multi-ethnic unified country dominated by the Chinese nation. After reunification, officials were set up in southwest minority areas, making them a part of Qin State. After the Qin dynasty destroyed Chu, it further unified the southeast Yue nationality area, and established Minzhong County (in present-day Fuzhou, Fujian) in the land of Dong 'ou and Fujian and Vietnam.

Subsequently, Qin Shihuang ordered Tu Sui to lead 5, troops south in five routes, and went deep into present-day Hunan, Guangdong and Jiangxi. At the same time, poor people, husbands-in-law and Jia people who were in debt were sent to support the war, and finally South Vietnam and Xi 'ou were unified, and Nanhai County, Guilin County and Xiang County were established. From then on, these areas became the territory of Qin State.

In the late Warring States period, there was a powerful nomadic tribe from west to north, Xiongnu, which rose in a rage and moved in Toumancheng, north of Yinshan Mountain (now the northern foot of Yinshan Mountain in the northeast of Wuyuan, Inner Mongolia). Its chief, Tou Man Khan, often used swift cavalry to go deep into the Central Plains to plunder food, population and burn cottages. King Wuling of Zhao therefore took defensive measures and emigrated to reclaim land.

But it still can't stop the Huns from going south. Jiuyuan Henan (referring to the south of the Yellow River) is occupied by them. In the twenty-sixth year of the first emperor (in the first 221 years), 3, households moved to Yuzhong, Hebei Province for reclamation, and at the same time, on the basis of the northern Great Wall of Qin, Zhao and Yan, a 5,-mile-long Great Wall was built.