Ví dụ công khai

To begin in the Yangtze Valley between Yi-ch’ang (Hupei) and Pa-tung (Szechwan), in the Hsiling Gorge area that was the gateway to the Red basin to the west: fifty-four early sites investigated in 1960 have been grouped into five categories, ranging in date, according to the estimates of the investigators, from Neolithic to Han.