Drinks in the Song Dynasty are very abundant in summer. According to historical records, in the Northern Song Dynasty, every summer in Bianliang, Tokyo, the streets were filled with stalls selling cold drinks. These stalls sold many things, including ice and snow licorice soup, frozen papaya juice, litchi water, bayberry wine and common mung bean soup.

The so-called ice and snow licorice soup is to boil licorice sugar with water, cool it and add ice cubes. It is said that this drink is very attractive and tastes cold. However, as modern people, we are sure to be curious. Now we can use the freezer to keep ice or produce ice. But in ancient times when technology was underdeveloped, how did the ancients preserve and make ice cubes? In fact, ancient people didn't make ice cubes at all. They only collect natural ice cubes. In the cold winter months every year, there are ready-made ice cubes in the river. People cut these ice cubes down and transport them to the underground freezer for storage. Wait until the next summer, and then take out these ice cubes to make cold drinks.

In fact, there were popsicles that we eat now in the Tang Dynasty, but at that time, popsicles were simply iced with some salt, some sucrose water was put in the bucket, and then a small stick was inserted to wait for it to condense into ice before taking it out. This is the earliest popsicle in the history of our country.

In fact, in addition to eating, there is also the embryonic form of air conditioning in the history of our country, which is the commonly used ice guide in ancient China. At first, the ice guide used a box made of bronze, but later it was found that wooden boxes were more difficult to melt ice, so later people put ice cubes in wooden boxes and covered them so that people could sleep on them and enjoy the cool.