ZhangjiakouPronunciation: /ˌdʒaŋdʒjɑːˈkəʊ/ (also Chang-chiakow)Definition of Zhangjiakou a city situated on the Great Wall in Hebei province, NE China; population 719,800 (est. 2006). Mongolian name Kalgan.Zhangjiakou in other Oxford dictionaries Definition of Zhangjiakou in the US English dictionary