Dish with incised chi-dragon pattern in white glaze, Ding ware, Northern Song-Jin dynasty, 12th-13th century Height 2.0 cm, diameter 12.0 cm, base diameter 8.0 cm.  National Palace Museum, Taipei. 

t is a small plate with a shallow mouth and a flat bottom. The whole vessel is fully glazed and only the mouth is inlaid with copper rib buttons. The disk is decorated with a coiled dragon, with its head turned sideways and its body coiled upwards clockwise. The knife and pen are simple and elegant. It is a common pattern in Ding Kiln. In 2009, archaeological excavations at Ding Kiln revealed relics from the late Northern Song Dynasty, including "Qiao Wei" porcelain pieces and fragments with similar patterns. The "Collection of Hundred Treasures" of the Southern Song Dynasty said: "It is so good if there are chi tigers on the bottom of the utensils." (Google traduction)