The earliest Camping Cots appeared in the late Warring States period. Its structure is generally divided into three parts: bed, bed bar and bed drawer. Each half of the bed is composed of bed stall, bed brace, stall brace and twisted wood. Such a bed can be folded, and the length and width of the bed frame will be much smaller after folding. The folding bed is generally made of hard wood.
Among the emperors of all dynasties in China, there are two distinctive carpenter emperors, who have reached the peak in carpentry and become possessed by the devil. One is emperor Yuanshun, a fat man who can design his own giant dragon boat, who was finally driven out of the Central Plains by Zhu Yuanzhang; the other is Zhu Yuanzhang's own offspring, the "talented Carpenter" of mingxizong, Zhu Youxiao, who is the inventor and manufacturer of the first folding bed in history.