The ancients called fans "shaking the wind" and "cool friends". In hot summer, the fan is a tool to generate wind power and cool down, and it is also a work of art. The material of the fan is silk, and the handle is ivory or jade. The queen's hand is not hot, it is easy to shake.
During the Ming and Qing Dynasties, the government stored a lot of natural ice and snow in the ice room in the first winter, and then took it out of the ice room in the next summer and put it in the bedroom to become an "ice tray". When the ice and snow melt, it constantly sends out a chill. The refrigeration effect is no less than that of modern air conditioning.
The refrigerator was invented during the Spring and Autumn Period and the Warring States Period. It was called "Ice Guide" at that time, and it was made of bronze. Slowly in the Qing Dynasty, it evolved into a wooden refrigerator with better refrigeration effect, called an "ice bucket". Put the ice cubes in the ice bucket, and then you can put the fruits and drinks on the ice. At the same time, there is a hollow vent on the lid of the ice bucket, through which cold air will come out, just like air conditioning.