| Gongyuan : Imperial Examination Authority 1900 | Gongyuan : Imperial Examination Authority 1750 |
| Gongyuan : Imperial Examination Authority in Ein Tagebuch in Bildern, published by 1902 | Gongyuan : Imperial Examination Authority in The Complete Map of Peking, Qianlong Period. |
| http://dsr.nii.ac.jp/toyobunko/La-161/V-1/page/0087.html.en |