After the potsherd was discovered, the Shandong University people laid out all the items excavated from the same spot on a concrete area of ground and checked each and every one of them, confirming that among the hundreds of potsherds present, none originated from later than the Longshan period.
山東大學曾在發現陶片後，將同處發現的各項物件，攤在水泥地上逐項查明，證明數百片陶片無一晚於龍山時期，排除了後期陶片混入的可能。