Hancheng (Beijing) - Kanjo

… When the Qing dynasty replaced the Ming dynasty as the capital in 1644 (the first year of the Shunzhi era), the Inner City was used exclusively as a residence for the Eight Banner Soldiers (Manchu, Mongolian, and Han) and their families, and the Han people, including merchants and government officials, were not allowed to live there, and were all forced to move to the Outer City. This is probably why Westerners called the Inner City of Beijing the Tatar City (Tatar City, Manchu City) and the Outer City the Chinese City (Han City). Needless to say, the forced relocation of the Han people led to rapid development of the Outer City. …

*Some of the terminology explanations that mention "Hancheng (Beijing)" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　1644年(順治1)に明に代わって清がここを都と定めたとき，内城はもっぱら八旗兵(満･蒙･漢)とその家族の居住地とせられ，漢人は商人はもちろん官吏も居住することを許されず，ことごとく外城に移住させられた。西洋人が北京内城をタタール･シティTatar City(韃靼（だつたん）城，満州城)，外城をチャイニーズ･シティChinese City(漢城)といったのは，そのためであると考えられる。漢人の強制移住によって，外城が急速に発展したのはいうまでもない。…

※「漢城（北京）」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報