↑China Postal Album: Showing the Postal Establishments and Postal Routes in Each Province (1st ed.), Shanghai, China: Directorate General of Posts, 1907
↑Figures based on 2006 statistics published in 2007 National Statistical Yearbook of China and available online at Script error: The function "Lang" does not exist. (archive). Retrieved 21 April 2009.
↑"Basic Information". Beijing Municipal Bureau of Statistics. Archived from the original on 13 March 2012. نه اخيستل شوی 9 February 2008.
↑走进北京七大世界文化遗产 – 千龙网. qianlong.com (په Simplified Chinese). 18 August 2014. Archived from the original on 29 November 2014. نه اخيستل شوی 21 November 2014.
↑2015年北京市高校名单(共91所). gaokao.com. 22 May 2015. Archived from the original on 30 November 2016. نه اخيستل شوی 29 November 2016.
↑Hucker, Charles O. (1958). "Governmental Organization of the Ming Dynasty". Harvard Journal of Asiatic Studies. 21: 1–66. doi:10.2307/2718619. JSTOR2718619.
↑Lane Harris (2008). "A 'Lasting Boon to All': A Note on the Postal Romanization of Place Names, 1896–1949". Twentieth Century China. 34 (1): 96–109. doi:10.1353/tcc.0.0007. S2CID68653154.
↑Coblin, W. South. "A Brief History of Mandarin". Journal of the American Oriental Society 120, no. 4 (2000): 537–552. doi:10.2307/606615. کينډۍ:Jstor.