When picking watermelons, first look at watermelons and see the skin lines. There are many lines on the surface of each watermelon. If these lines are very clear and delicate, it means that this watermelon has matured naturally and must be red and sweet.

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On the other hand, if the lines look fuzzy, it means that the watermelon may not be ripe, or it may be picked early, so it is probably not sweet.

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You can also look at the navel when picking watermelons. If the navel is bigger, it means that the skin of this watermelon is thicker and may not be too sweet. If the navel is small, it means that the skin is thin and the taste is sweet.

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Of course, it's ok to clap and listen, which is well known to all. The specific method is as follows: hold the watermelon in one hand and pat it gently with the other hand. If the hand holding the watermelon has obvious vibration feeling, it means that the melon is ripe. If the sound you hear is dull when shooting, it means that this watermelon is sweeter with more water. If it sounds crisp, it means that although this watermelon has a lot of water, it is not very sweet.

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Another way is to look at the handle of watermelon. If the handle is straight, it means it is not sweet. If it's curved, it means it's sweet. (This method is not particularly accurate, it is better to look at the navel and grain of melon more accurately.)

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