Introduction to the irons of the Han Dynasty: The iron shown in the picture is a cultural relic of the Han Dynasty. The iron in ancient times was like the frying pan used today. Before ironing, red-hot charcoal was placed in the iron, and it was ready for use after the bottom was hot enough to burn your hands, so it was also called a "fire pan." The iron was invented in the Shang Dynasty and was mainly used as a torture tool to iron the skin of prisoners. During the Ming and Qing Dynasties, it was gradually used for civilian use for ironing clothes.