The ancient people mainly relied on fans to enjoy the cool, and fans were mostly made of bamboo. The ancients called it "shaking the wind" and "cooling friends". People with good economic conditions will buy silk fans, which are easy to shake. It would be really interesting if the literati wrote poems and paintings on the fan again. If you are a powerful person, you can enjoy the comfort brought by the "artificial fan" in the heat. There was no refrigerator in ancient times, so the ancients used a freezer to store ice cubes. According to modern archaeological discoveries, the earliest igloo appeared in the Zhou Dynasty. Of course, this luxurious "refrigerator" is only available to the government, and ordinary people cannot enjoy it. Generally speaking, the government stores a lot of natural ice and snow in the freezer in the first winter, and when the next summer comes, it takes ice or snow out of the freezer and puts it in the living room to become an "ice tray". When the ice and snow melt, it constantly sends out a chill. By the Ming and Qing dynasties, this way of using ice to escape the heat had entered the homes of ordinary people. This luxurious summer resort is exquisitely designed, and is generally built by water, which fully embodies the ancient people's awareness of environmental protection and the green concept of being close to nature. In the Tang Dynasty, there was a pavilion dedicated to summer. In the center of the cool hall, mechanical refrigeration equipment was installed. Based on the principle of cold water circulation, it is shaken by a fan, and the generated wind sends cold air into the hall. Later, it was developed to use machinery to send cold water to the roof and let it go straight down the eaves, forming an artificial water curtain to arouse the chill, thus achieving the purpose of cooling off the heat. In the Song Dynasty, in addition to the imperial palace, high officials and dignitaries also set up private "pavilions" for summer vacation, which not only sent cold water with wind wheels, but also decorated various flowers on the reservoir and around the hall, bringing more spiritual pleasure while enjoying the cool. In the Ming Dynasty, this summer building was transferred from the imperial palace to the folk. As early as the Northern and Southern Dynasties, there was a custom of making homemade "soup cakes" to escape the heat. In the Song Dynasty, there were more varieties of food in summer, including melons, plums, lotus leaves, mung bean soup, eel soup, silver seedlings, lotus seeds and so on, among which watermelon was the most popular. During the Ming and Qing dynasties, lotus seed soup was the most popular in summer. In the Qing Dynasty, some people in Beijing chose perilla leaves, epimedium, licorice and other Chinese herbal medicines for summer vacation, which is also a major feature. Suzhou people like to drink refreshing foods such as herbal tea, soup and bean jelly.