Ice cream has been around since the Tang Dynasty. At that time, it was mixed with edible rubber powder and various precious juices and put into the freezer. But at that time, it was difficult to make ice cream, and the materials were expensive. Civilians generally didn't eat ice cream. At that time, ice cream was regarded as a dessert, and only princes and nobles could enjoy it. As for jelly, it was impossible to make jelly without jelly powder in ancient times. Also, the ancient people used to cool off the summer heat instead of ice cream, but iced sour plum soup. Soup squeezed from fresh plums, and then fresh ice cubes are cut from the ice room with an ice skate and put into the soup to relieve the heat and produce fluid.