The Kehe sites may be older than the Sinanthropus site, and the formers seem to be nearer to the Gongwangling site in climatic environment as viewed from mammalian faunas.

• 匼河地点的时代有可能比北京人者古老;由动物群反映的气候环境看来,匼河地点较接近公王岭。匼河发现的石制品和北京人者有共同点,也有明显区别;但其原始性却不明显。