| Andingmen : the North Gate of Inner City 1900 | Andingmen : the North Gate of Inner City 1750 |
| Andingmen : the North Gate of Inner City in Ein Tagebuch in Bildern, published by 1902 | Andingmen : the North Gate of Inner City in The Complete Map of Peking, Qianlong Period. |
| http://dsr.nii.ac.jp/toyobunko/La-161/V-1/page/0067.html.en |