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秦皇一统确立了古代中国疆域的基础范围。这片疆域东南两边直抵大海,西部被青藏高原阻挡,北部则以长城为界,与内陆温带草原区隔,面积大致有340万平方公里。此后各中原王朝均以征服并保住秦皇故地为己任,对边疆地区的控制力时强时弱,很不稳定。元朝曾短暂改变了这一局面。不过明朝建立后,在控制秦皇故地后又自行停住了脚步。崛起的满清王朝替代了明王朝,他们赶在列强来临之前,及时
Qin Huang unified the ancient Chinese territory established the basic scope. This area borders the sea to the southeast on both sides, blocked by the Qinghai-Tibet Plateau in the west and the Great Wall in the north, separated from the inland temperate steppe by an area of roughly 3.4 million square kilometers. Since then, all Central Plains dynasties have taken the responsibility of conquering and keeping the former Qin Emperor’s homeland as its own responsibility, while the control over the border areas has been weak, strong and unstable. The Yuan Dynasty briefly changed this situation. However, after the establishment of the Ming dynasty, in control of Qinhuang and then stopped by itself. The rise of the Manchu dynasty replaced the Ming dynasty, they rush in time before the arrival of the powers