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In order to find out the kiln of some articles unearthed at Fancui tomb of Northern Dynasty, we use the article samples to track to a kiln site near Cao village, Linzhang town, Hebei province. By compare and contrast of Cao village kiln samples with Northern Dynasty tomb articles, we conclude that Cao village kiln are of Northern Dynasty. We measure the physical properties and the chemical composition of the samples using energy dispersive X-ray fluorescence (EDXRF), and identify the samples are of lead glaze pottery, Fuzzy cluster analysis of the samples shows that Cao village kiln body samples raw materials come from 3~4 batches, while the glaze samples raw material come from 3 batches. It also shows that the body raw materials and the glaze raw materials of the sample supporting pins are the same as those of Cao Village kiln.