Shang and Northern Zone sites, in the north-central sector; and the Qijia, Xindian, and Siwa cultures in the northwestern portion, including the present-day Gansu and Ningxia provinces. Literature Wang Binghua, A Preliminary Analysis of the Archeological Cultures of the Bronze Age in the Region of Xinjiang//Anthropology & Archeology of Eurasia, Vol. 34, No 4, Spring 1996, DOI 10.2753/AAE1061-1959340467 The Cambridge History of Ancient China, M. Loeuwe, E.L. Shaughnessy, eds., Cambridge University Press, 1999, Notes Bronze Age in China Culture in Hebei Culture in Shanxi Culture in Shaanxi Culture in Henan Culture in Liaoning Archaeological cultures of China