The most recently recognized, and perhaps the earliest phase of the Yang-shao culture in the Chung-yüan region, is a complex of artifacts first known from the Li-chia-ts'un site of Hsi-hsiang in Shensi, on the southern side of the Tsinling Mountains on the upper Hanshui River, and since identified in a series of sites north of Tsin-ling in the Weishui Valley even the Huangho Valley in Honan, including the lower strata at Pei-shou-ling in Pao-chi and Yüan-chün-miao in Hua Hsien, and the sites at Lao-kuan-t'ai in Hua Hsien and on the banks of River Lo near Lo-ning, western Honan.