| 1 | There are many historic sites in the Changping county, such as Juyongguan, the famous juncture of the Great Wall, the thirteen mausoleums , the palace underground and so on. | |
| 2 | The muddy hill was leveled in 1864. Although the muddy hill no longer existed, the name stuck. Catholic missionaries built an orphanage here and founded workshops for art work; |