The elegant form of this bottle vase illustrates the inter-relationship between metal and ceramic versions of this shape. See several metal examples, all dated to the Tang period, included in the exhibition, Tin-Bronze of China, Kuboso Memorial Museum of Art, Izumi, 10 October - 23 November 1999, pp. 32-3, nos. 56-9, and the very similar pottery example, also dated Tang, illustrated in Zui To no bijutsu, Osaka, 1976, p. 10, no. 1-61. A Northern Qi example, dated to 575, which appears to be slightly more squat and with a shorter, wider neck, was excavated from a tomb in Anyang City, Honan Province, and is illustrated in Sekai toji zenshu, vol. 10, Tokyo, 1982, p. 115, no. 103.