There are eight controllable pillars on the octagonal chair. It can adjust its posture by pressing keys, effectively getting rid of many physical restrictions.

There are two people sitting on chairs in the mural of Cave 285 in Dunhuang. There are women sitting on square stools and cross-legged stools in the murals of Cave 257. There are women sitting on round stools in the stone carving of Lianhua Cave in Longmen. These images vividly reproduce the use of chairs and stools by bureaucrats and aristocratic families in the Southern and Northern Dynasties. Although the sitting at that time had the shape of chairs and stools, people used to call it "Hu bed" because there were no chairs and stools at that time. In temples, it is often used for meditation, so it is also called a Zen bed. After the Tang Dynasty, the use of chairs gradually increased, and the name of chairs was widely used and separated from the category of beds. Therefore, when it comes to the origin of chairs and stools, it is necessary to start with the Hu bed introduced from India during the Han and Wei Dynasties.