The melon seeds include sunflower seeds, watermelon seeds and pumpkin seeds. The fat content of sunflower seeds is about 49.9 g/100g; The fat content of watermelon seeds is about 44.80 g/100g; The fat content of pumpkin seeds is about 48. 10g/ 10g.

The custom of eating melon seeds was popular in China in Ming Dynasty. Before the late Qing Dynasty, it was mainly watermelon seeds. Since the late Qing Dynasty, pumpkin seeds have become popular, and sunflower seeds have mushroomed in the Republic of China, which made them very popular. Eating melon seeds probably originated in the north, not only because the records of eating melon seeds are mainly found in historical documents in the north, but also because the winter in the north is long. During the slack season, everyone stays at home all day to avoid the cold, and the main way to kill time is to chat with melon seeds, so the custom of eating melon seeds spread.