The form of this vase is derived from an ancient bronze vessel known as 'hu' (壶). Copies of ancient wares, including vases, were made during the reigns of Yongzheng (1723–1735) and Qianlong (1736-1795). Both emperors had a personal interest in studying antiques, and copying archaic forms and decorative styles. Hence, drawings or even wooden models of various ancient objects were sent to the imperial kiln in Jingdezhen for potters to copy. This green-glazed vase emulates Guan 官 ware of the Southern Song period (1127–1279), one of the five great wares of the Song dynasty (960–1279).