The mirror is in the shape of a petal. On the back is a knob surrounded by designs of lotus-like flowers called Baoxianghua, which differ greatly in shape. During the flourishing period of Tang Dynasty, floral designs became the main theme in mirror decoration instead of just being embellishments. The use of decorative designs of lotus-like flowers, auspicious flowers and pearl-like flowers made the artistic styles of Tang mirrors become more diversified. The themed designs and decoration of Tang mirrors completed its evolution from auspicious beasts to birds and then to floral designs.