The Ordos area in northern Shensi and southern Suiyüan is famous for its Upper Palaeolithic industries, and recent discoveries in the neighborhood of P’ien-kuan Hsien in northwestern Shansi and Ch’ing-shui-ho Hsien in southern Suiyüan appear to indicate Mesolithic assemblages characterized by microblade artifacts and points and scrapers made on “Mousterian” flakes, features resembling the Sha-yüan assemblage of the lower Weishui Valley in central Shensi.