Lot 80. A celadon-glazed 'bagua' vase (cong), Guangxu mark and period. Height 10 3/4  in., 27.3 cm. Estimate 6,000 — 8,000 USD. Lot sold 7 500 USD. Photo: Sotheby's.

modeled after the archaic jade prototype, the body of square section rising from a short straight circular foot to a tapering circular neck with a lipped rim, molded with the bagua (Eight Trigrams) to each of the four sides, covered overall in a lustrous pale bluish-celadon glaze, drilled six-character mark in underglaze blue. 

Sotheby's. Monochrome, New York, 15 sept. 2015