A cong form with a conical neck and cylindrical foot separated by a square-sectioned body with rectangular slab walls, the colorful glaze of mottled bluish green color and purplish blue color covering most surfaces except the tall foot ring. A six-character mark of ‘Da Qing Qianlong Nian Zhi’ to the bottom. H:11 3/8in(29cm) W:4 3/4in(12.2cm) M:3in(7.6cm)