The styles of bronze mirrors in Han dynasty have changed obviously. In the early Western Han Dynasty, it followed the style of Warring States mirror, including curling, bow or string buckle. In the middle of the Western Han Dynasty, the mirror body was thicker, and the wide flat edge and arc edge replaced the curling edge. Since the period of Wang Mang, decorative rings have been added to the flat edges, often with floating clouds, rolled leaves, honeysuckle, geometric patterns and animals as the themes. The decorative patterns of bronze mirrors in Han dynasty were constantly changing and innovating, and the complex plane patterns in the early years of Western Han dynasty became double-line and three-line patterns. It disappeared in the middle of the Western Han Dynasty. In the middle of the Western Han Dynasty, the plain pattern was simplified to S-shape, with nipples, blades of grass, nebulae and regular patterns. From the beginning of the new barbarism, Suzaku, Xuanwu and other Swiss animals and feathers combined into a circle.

Source: Evolution of Bronze Mirror Style in Han Dynasty, China Business Daily, 20011107.

In addition, you are advised to refer to:

"Abstractionism" of Bronze Mirrors in Han Dynasty, China Business Daily, June 5438+1October 4, 2007.

Guo: Appreciation of Acacia inscriptions on bronze mirrors in Han Dynasty, Silk Road, S 1, 2000.

Wei Qi: Study on Bronze Mirror Decorations in Han Dynasty, Journal of Suzhou University, 1, 2005.

The above information comes from Hangzhou Library, hoping to help you answer your questions.