In the frescoes of cave 257, there are women sitting on square benches and cross legged benches; There is a woman sitting on a round stool in the stone carving of Longmen lotus cave.

These images vividly represent the use of wrought vintage iron chairs in the families of officials and nobles in the northern and Southern Dynasties.

Although the seats at that time had the shape of chairs and stools, people used to call them "Hu bed" because there were no chairs and stools at that time. In temples, they were often used for meditation, so they were also called "Chan bed".

After the Tang Dynasty, the use of chairs gradually increased, and the name of vintage iron chairs was also widely used, which was separated from the category of bed. Therefore, when we talk about the origin of chairs and stools, we must start from the Hu bed in the Han and Wei dynasties.