Please compare the routes of Qin, Han, Sui, Tang, Song, Yuan, Ming, Qing, Republic of China and all previous dynasties to unify the whole country.

He who wins the Central Plains wins the world. The Tang Dynasty occupied Chang 'an and Luoyang from Taiyuan, Shanxi, which is now Henan, and then wiped out the warlords in Yu Wenhuaji and Jiangdu along the river. The Song Dynasty unified the south from the lower reaches of the Yellow River, but in fact most of the land in the north was not unified. In the Yuan Dynasty, Mongolia unified China. In the Ming Dynasty, Zhu Yuanzhang divided his forces to attack Du Yuan, and Yuan Shundi fled to the desert to further unify China.

That is now Beijing: the Qing Dynasty originated in Liaodong and then unified the Nuzhen ministries in the northeast, then came in from Shanhaiguan in the northeast, occupied Beijing, and then unified the south; During the rule of Beiyang warlords, the Republic of China was a warlord regime until Sun Yat-sen established the Whampoa Military Academy in Guangzhou and launched local armed forces. After Sun Yat-sen, Chiang Kai-shek unified the south and automatically joined the central government through three warlord scuffles in the northeast, and the Republic of China formally unified most of China. * * * The Republic of China expanded the revolutionary base areas in northern Shaanxi, and occupied many revolutionary base areas in the north after the Anti-Japanese War. After three battles, Nanjing unified the new China.

Generally speaking, all the dynasties basically occupied the key areas of the Central Plains, or occupied the capital, and gradually unified the whole country.

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