The Bunu Yao song texts are folk oral records of the Yao ethnic group that are once transcribed in the ancient Zhuang characters and spoken in the northern Zhuang dialect. The Zhuang, Han, and Yao ethnic groups inhabit together in northwest Guizhou, which provides an essential field for intergroup contact and a spatial basis for ethnic interaction and integration. Intergroup contact among the Zhuang, Han, Yao ethnic groups in northwest Guizhou during the late Qing Dynasty and the early years of republic of China was separated into positive and negative contact circumstances depending on factors like politics, transportation, economy and education. Interdependency, intergroup interaction, intergroup emotion, and cognitive elements, among others, are the mediating factors of intergroup contact. The historical experience manifested in these mediating factors nonetheless has significant implications for the current promotion of ethnic interaction and integration.