The archaeological excavation report Shizhaocun and Xishanping compiled by the Institute of Archaeology, CASS, is a comprehensive and systematic summation of the rich material from the Shizhaocun and Xishanping sites in Tianshui city, Gansu, excavated by the Gansu and Qinghai Archaeological Team of the Institute as long as ten years in 1981--1990. Containing evidence of the superimposion of the successive layers from the Dadiwan I culture to the Qijia culture, the two sites revealed a complete evolutionary sequence of the prehistoric culture in the Weihe River valley. The book constitutes a batch of important achievements in the prehistoric archaeology of Gansu, and has great scientific value and academic significance to studying the history of primitive society in the Northwest of China.