why do you call stupid people "fools" instead of "stupid fruits", "stupid beans" or "stupid vegetables"? Tracing back to the source, there is also an interesting story. It turns out that the "melon" of "fool" does not mean "melon" in "melon and bean".
In ancient times, the area around the Qinling Mountains was named Guazhou, and the people who lived there were also called Guazi people. This people are very honest and trustworthy, and they can bear hardships and stand hard work. Whenever they are employed by people, they always work hard quietly and never stop. In this way, people mistakenly think that they are stupid, and then call people who are not smart "melon seeds" and "fools". In the Notes of Renshutang in the Qing Dynasty, there was a saying that people in Ganzhou (now Gansu) said that they were not wise and said melon seeds.