During the summer season, watermelon is a good product for clearing away heat and preventing heatstroke, but most people tend to "pick melons from piles, and the more they pick, the more they look." Here are a few ways to identify watermelons.

(1) Sensory identification method. That is to use the sense organs such as ears and eyes to identify. The first is to look: any mature watermelon is usually full-grown, with a nice, shiny, oil-stained skin. The lanugo hair on the skin has receded, leaving only a ring of fluff on the pedicle; the second is to listen. : Gently hold the watermelon with your hands, put it next to your ears, and gently scoop it up with your hands. If there is a "sizzling" sound inside the melon, it means it is a ripe melon, and most of it is a sand-crusted melon.

(2) Specific gravity identification method. Generally, mature watermelons are lighter in weight and immature watermelons are heavier. Two watermelons are about the same size. One is light and the other is heavy. The lighter one is a ripe melon.

(3) Knocking method. Hold the watermelon in one hand and tap it gently with the other hand, or tap it with your index and middle fingers. A ripe watermelon will make a dull sound when knocked, while an immature watermelon will sound crispy when knocked. The general rule is that a melon with a "muffled" sound is a ripe melon, and a melon with a "crisp" sound is a raw melon. Under special circumstances, if some melons have too thick skin, they will sound muffled when knocked, but they are mature melons. When encountering the above situation, it is necessary to "comprehensive identification and flexible application".