The Chinese phrase Four Great Ancient Capitals of China (中国四大古都 pinyin zhong1 guo2 si4 da4 gu3 du1) refers to Nanjing, Beijing, Xi'an, and Luoyang.
... families residing in the village. The population density is 105.9/km² (274.2/mi²). There are 578 housing units at an average density of 82.3/km² ...