1, watch the color. Melons with smooth surface, clear patterns, obvious lines and yellow bottom are ripe melons; The surface is fuzzy, dull, mottled and unclear, which is an immature melon.

2. Listen to the sound. Keep your ears close to the watermelon. Pat the watermelon with your palm or play it with one finger. If it is ripe, it will make a "bang" sound. If it is raw, it will make a "dang" sound. If it is overripe, it will make a "poof" sound. You can also put the watermelon in your ear and squeeze it gently with both hands, and the ripe melon will crack.

3, look at the melon handle. Green is ripe melon; Dark brown, fluffy, bent and brittle, and the tip of curled beard turns yellow and withered, which is a melon picked prematurely; The handle of the melon has dried up, which is a "dead vine melon" with poor quality.

4. Look at the head and tail. The two ends are symmetrical, the navel and pedicel are deeply sunken, and the good melons are full around; A melon with a big head and a small tail or a thick tip and tail is of poor quality.

5. Specific elasticity. The melon skin is thin, and it is fragile when pressed with your fingers, which is a cooked melon; Scratch with your nails will crack, and the melon will be soft, which is overripe.

6. Use your hands. Those who have a sense of emptiness are ripe melons; Those who feel sinking are raw melons.

7. Try the specific gravity. It is ripe melons that float upward when thrown into the water; It is the raw melon that sinks. If it is two watermelons of the same size, the ripe watermelon will be lighter. Moreover, cooked melons will float when put into water, while raw melons will sink.

8. Look at the size. In the same variety, large is better than small.

9. Look at the shape. The melon body is neat and symmetrical, with normal growth and good quality; The melon is deformed, with abnormal growth and poor quality. Choose watermelons with smooth skin, obvious lines and well-proportioned figure, while watermelons with sharp heads and crooked brains are definitely not delicious. Pay special attention to the buttocks of watermelon, which should be full around and deep in the middle. The head of the melon and vine is better in green, and others, such as dark brown and yellow, are not delicious. Touching the surface, melons with smooth and hard skin are generally better, while the soft and sticky skin is not good.