In the first sedan chair, a rectangular board was fixed on two wooden poles. It is called "Shoulder-Shoulder Jade" or "Shoulder-Shoulder Jade" because it needs someone to carry it on your shoulders. Sedan chair, developed from chariot and Yu, is also called "Yu sedan chair" and "shoulder Yu". It was also called "bridge" and "paddle" in the pre-Qin period. It was originally used in rugged mountain roads, and Yu Xia crossed the mountain roads in a sedan chair while controlling water. The sedan chair in Qin dynasty consists of rectangular base, frame, columns, railings, top cover, sedan chair poles and lifting poles. There is a small door in front of the sedan chair, and the sedan chair bar is tied to the frame of the base, which is different from the shape of the sedan chair bar fixed in the middle of the sedan chair. Sedan chairs in Qin and Han dynasties were mainly used by dignitaries when they crossed mountains and mountains. On the mountain road, carriages, ox carts, etc. We couldn't get through, so we used manpower to get on the sedan chair. Sedan chairs in this period were made of bamboo, so they were also called "bamboo land". The ground is fixed on two bamboo poles, and the cross bar is fixed on the front and back of the two bamboo poles. When riding, the sedan chair person ties ropes to the crossbar and the lifting pole to carry the sedan chair, and then the sedan chair person holds the lifting pole and the sedan chair pole with one hand, so that the sedan chair can move forward smoothly. In the palace, there is also a kind of land without wheels, that is, a "chariot", which looks like a sedan chair when it is carried by manpower.
In the Song Dynasty, a high chair was installed in the sedan chair. In the past, people sat with their knees bent or their legs crossed. Now, people can sit in chairs, that is, sit with their feet down. The car body began to rise, the car pole was fixed in the middle of the car body, surrounded by cushions, a cocked helmet top cover, curtains hanging in front and windows on the left and right, which increased the sense of tranquility and warmth.
Judging from the evolution history of sedan chair, the structure of sedan chair is relatively simple, and it has gone through the changing process from the bar tied to the pedestal to the bar fixed in the middle of sedan chair, from no sedan chair to a sedan chair, and from sitting cross-legged to sitting with vertical feet. From being confined to the upper class to being improved to the people, its security, stability and warmth have gradually improved. However, compared with cars and ships, sedan chairs have limited carrying capacity and speed, so sedan chairs are useless in large-scale transportation and postal delivery. In modern times, when Chinese weddings are held in many places, the bride is still carried in a sedan chair.