Iron only appeared in the Spring and Autumn Period and the Warring States Period, but because the initial iron ore output was very low, iron was very precious. Until the Han Dynasty, iron was controlled by the state, so it was impossible to popularize iron pots on a large scale. At that time, luxury iron pots also belonged to the aristocratic class. The iron pots in the Han dynasty were all imitation bronzes, which were very heavy.
In the Tang Dynasty, only the rich could afford an iron pot, but in the Song Dynasty, it was different. Because the ironmaking industry is developed, every household can afford an iron pan. In the early Song Dynasty, China's food culture was really enriched. At that time, weapons gradually turned into iron. In the Han dynasty, people used ceramic cookers most often, and occasionally there were bronze tableware, but only a few people had them at home.
It is also recorded in Xiang Yu's biography. When Xiang Yu burned his bridges, the kettle inside was a kind of cooker. At that time, other tools were needed to use the kettle, and the lower layer of the kettle was used as a kettle for holding water. Boil water to make steam rise, put a steamer on it, and put rice, fish or meat inside.
It was not until around 1 100 that Europe learned the technology of cast iron. In Europe in the late Middle Ages, if there was an iron pot at home, it was also regarded as a treasure, but it was to be left as a family heirloom in the will. /kloc-Europe in the 4th century corresponds to the Yuan Dynasty in China. At that time, there were three big feet at the bottom of all the iron pots, and the cost of casting iron pots was very expensive, and the wall thickness of iron pots at that time was very thick, which was caused by the immature cast iron technology at that time.