People in the Qin dynasty sit on the floor, but they can't sit with their legs crossed. This is a sign of disrespect for others. They had to sit with their legs together and their heels on the ground. When eating, everyone puts a long short table in front of them and calls for several boxes or boxes. From Zhang Qian to the Western Regions, tables were gradually introduced to China, and chairs appeared at the end of the Han Dynasty. But at that time, the table was relatively simple, with only the table top and legs, and the back of the chair was relatively short. It was not until the Song Dynasty that they developed into today's style.