In late 1926, Black submitted a proposal to the Rockefeller Foundation seeking financial support for systematic excavation at Zhoukoudian and the establishment of an institute for the study of human biology in China.
Black je krajem 1926. podnio prijedlog Zakladi Rockefeller za financiranje sustavnih iskopavanja u Zhoukoudianu i uspostavljanje instituta za istraživanje ljudske biologije u Kini.