Why is Quyang stone carving difficult to comment on?

Since Quyang stone carving was collected in the Sculpture Hall of the Palace Museum in Beijing immediately after it was unearthed, no text was introduced and published since then, let alone picture books such as catalogues. Therefore, it is quite difficult to make specific comments on the works. Only one picture published in the third issue of Archaeological Newsletter 1955 may belong to a musician in the Sui Dynasty. Although this statue has lost its main head, its shape is still perfect and vivid, showing a simple and refined artistic image, which is a common sculpture method in Sui Dynasty. Because Quyang is carved with local white jade, it has not been weathered and denuded, so the edges and corners are still distinct. Unlike the stone statues unearthed in Sichuan, most of them are carved with red sand, and the carved outline is easily weathered and blurred, so it is precious.