Chengziya, also spelled Chengziyai, is a Chinese archaeological site and the location of the first discovery of the neolithic Longshan culture in 1928. The discovery of the Longshan culture at Chengziya was a significant step towards understanding the origins of Chinese civilization. Chengziya remains the largest prehistorical settlement found to date. The site is located in Shandong province, about to the east of the provincial capital Jinan. It is protected and made accessible by the Chengziya Ruins Museum .