The form of the current box and cover simulating a lotus flower in bloom with a mature pod in the centre, is one of the innovative forms presented by the potters at the imperial kiln during the Yongzheng period, when it was rendered in several different glaze colours including white, celadon and qingbai, see examples in the Palace Museum, Beijing, illustrated in Gugong Bowuyuan cang Qingdai yuyao ciqi, juan 1, vol. 2, Beijing, 2005, nos. 93, 103, and sold at Christie's Hong Kong, 1 November 2004, lot 1153, respectively. Boxes of this type made after the Yongzheng period are rare and seldom published.