From Mandarin 平谷 (Pínggǔ) Wade–Giles romanization: Pʻing²-ku³.
Pingku
- Alternative form of Pinggu
1972 [1972 July 10], “After Peking Man”, in Eastern Horizon[1], volume XI, number 4, Hong Kong: Eastern Horizon Press, →ISSN, →OCLC, page 67, column 1:Three polished stone axes with sharp blades have been found in a village of Pingku County on Peking’s eastern outskirts.