The image is a photograph of a plaque on a wall that reads "In the vast area of modern Sichuan and neighboring regions, there are many ancient sites that yielded similar cultural remains. These sites constitute a regional cultural system-the "Shu culture" which spans the Xia, Shang and Western Zhou periods (i.e. ancient Shu culture), and a late phase, which covers the Eastern Zhou period (i e. Ba-Shu Culture). The Sanxingdu culture type is centered in the Chengdu plain. The development may be divided into four periods, which together span approximately 4800 BC through 2800 BP, roughly corresponding to the Longshan culture period through the end of the Shanghai dynasty. Period I belonged to the late Neolithic period in the Central Plain. The SanXingdui culture is the great achievements manifested by the Sanxingui culture. The great achievements of the ancient Chinese civilization and that it had reached an advanced stage of development at that time.