During the Song and Yuan Dynasties the bronze mirrors appeared in all shapes: round, rectangular, rhomboidal, octagonal, and those with a handle.
宋，元时期出现了圆镜，长方镜，菱镜，八棱镜和带柄手镜等。
2
These cells are filled with starch grains as well as mostly one and sometimes 2 to many rhomboidal or square shaped protein crystalloids, but lipid is seldom seen.