The current vase imitates the shape and design of earlier Shang or Western Zhou dynasty bronzes. It was produced at a time when archaism became popular in the Qing court, particularly during the Qianlong reign. Compare this to a similar white jade gu, illustrated in Zhongguo Yuqi Shangjian, Hong Kong, 1996, pl. 631. See also a related green jade gu and a variation with flanges, see Jadeware (III) - The Complete Collection of Treasures of the Palace Museum, Hong Kong, 1995, pls. 130 and 131.