Generally speaking, the seeds in the watermelons we eat every day can also be made into watermelon seeds, but they are too small, so the watermelon seeds produced in the market usually come from special watermelon varieties, such as those in Lanzhou. Guagua, also known as seed melon, produces melon seeds with black edges and white hearts, full grains and large size, so it is known as "Lanzhou black melon seeds" or "Lanzhou large-scale melon seeds" in the international market. In autumn, when the seed melon is ripe, you can break it with your fist, eat meat, take seeds, wash it with water and dry it in the sun, and it can be listed.

Black melon seeds are rich in protein, fat, vitamin B, D and other nutrients. , mostly used for daily consumption, is one of the most popular delicious foods.