In ancient times, people used to sit on the floor. In the Tang Dynasty, they changed their living habits and sat on stools.
People in China used to sit on the floor, but now they sit on stools, which is also called sitting with their legs hanging down. Nowadays, many places in the world sit with their legs hanging down. So, for China people, when did this change begin? Mr. Ma Weidou pointed out that stools, chairs and the like began to appear in China in the Tang Dynasty, and were basically popular in the Song Dynasty. This statement is also generally correct.