| The tombs of the Wang clan are particularly noteworthy for the over one bundred pieces of antiquarian-style earthenware they contain. When compared with the ritual objects recorded in the San-lit'u, a Northern Sung text by Niegh Ch'ung-I, it is clear that the San-lit'u supplied the models for these vessels. The discovery of similar earthenware vessels in the His-an and Pao-chi regions of Shensi suggests that during the Yuan dynasty, a tradition of producting funerary wares based on illustrations in the San-lit'u existed in the areas of modern-day Kansu and Shensi. By contrast, funerary earthenwares from Yuan dynasty tombs in the Lo-yang area follow the illustrations of the Hsuan-ho poku t'u, produced by the late Northern Sung court. Although the Lo-yang wares are represented by only two tombs, the ethnic status of both occupants is clear: one is Mongol, the other in Han Chinese. This suggests that the determining factor for funeral earthenware was regional, not ethnic.
Upon examining other northern burials, such as those of the Yuan dynasty Peking region, it is immediately obvious that regionally specific wares transcend ethnic boundaries. The same distinctive wares are found in the tombs of Han Chinese, Mongols, and Central Asians from the region of present day Pakistan. Here again, we see burial customs dictated primarily by regional, not ethnic, identify.