According to the standard, the temperature can be kept at about℃ at a depth of about 4-5m underground. If the ice is big enough, it won't melt easily. If you want to store ice until summer, the first step is to dig a cellar, which is usually about 5 meters deep. Most of the ice in the freezer is stored in winter or shipped from the north.
It is very convenient to use this summer. In the Tang Dynasty, Xuanzong rode a princess and laughed in the world of mortals. When Yang Guifei ate litchi, she kept it with ice cubes. After the cellar is dug, lay a grass felt under it.