During the Warring States Period, bronze mirrors were produced in large numbers. During this period, the bronze mirror was more delicate and light and its buttons were small and thin. It was generally decorated with fine patterns. The most common ones were mountain patterns, dragon and phoenix patterns, mosaic patterns, continuous arc patterns, diamond patterns and so forth.
The bronze mirrors in the Han Dynasty were generally thick and heavy, and there were often inscriptions of auspicious words on the mirror. The mirror buttons were mostly hemispherical, and the persimmon-shaped button holder was very popular. At that time, there was also a kind of light-transmission mirror called "Light of Seeing the Sun". When the mirror surface was exposed to sunlight, the wall reflected the pattern corresponding to the mirror back.
From the middle of the Han Dynasty to the Wei and Jin Dynasty, there were embossed portraits and oracle mirrors.
