A large calcified jade carving with the grain of millet archaic style relief decoration and an openwork carved top cusp with dragons, qilong and taotiè. This object, known as "Pi", is one of the most iconic ritual objects of the Chinese tradition. The oldest historical evidence related to this particular type of artifacts dates back to the Neolithic period and can be detected Liangzhu culture, the last of the great Chinese Neolithic cultures, which flourished on the Yangtze delta around the fourth millennium BC. According to scholars, the particular shape of a disc perforated in the center would be attributable to a hyperstization of the universe, linked to metaphysical symbols that signify the central hole as a celestial axis on which the whole firmament is hinged. This interpretation, widely acknowledged nowadays, seems to have not yet been formulated in the eighteenth century, considering that emperor Qianlong, an avid collector of archaeological objects himself, had a poem been inscribed on the most beautiful of his jade discs stating that it was “a cup holder from the Song era”.