Do you know the origin of mirrors?

According to the data, the mirror was renamed as a mirror in the Han Dynasty. During the Han and Wei dynasties, bronze mirrors gradually became popular, and full-length mirrors appeared. At first, the bronze mirror was thin, with a circular flange, decorative pattern or inscription on the back, and a semicircular button in the center of the back, which was used to place the handleless mirror, forming a unique style of China mirror. Glass mirrors were introduced in the Ming Dynasty. After Qianlong in Qing Dynasty, glass mirrors became popular. Japanese and Korean bronze mirrors were first introduced from China. Glass mirrors became popular in Japan during the Meiji Restoration. The early days of slavery in China were in the Bronze Age. In the long-term bronze smelting and casting practice, people realize the relationship between alloy composition, properties and uses, and can manually control the proportion of copper, tin and lead. The ancient book Kao Gong Ji recorded that "there are six kinds of gold", that is, the proportion of six alloys. The last one is together: "Gold and tin are half, which means it's the same." Is the proportion used to make bronze mirrors. "Sword" is a mirror with high tin content, because the bronze mirror has bright surface and silvery white color, and it also needs casting performance to ensure the fine pattern. China people made a beautiful "transparent mirror" more than 2000 years ago, which can reflect the beautiful patterns behind the bronze mirror, thus arousing great interest of the world.