Who knows why wax gourd, watermelon and pumpkin are so named?

Watermelon was introduced into China from the Western Regions, so it is called "Watermelon".

Winter melon is ripe, and it is covered with frost, which looks like winter snow falling on it. Summer and autumn are hot and very pleasing to the eye, hence the name "winter melon".

Pumpkin originated in South Asia and was introduced to China, hence the name "Pumpkin".

Pumpkin is also commonly known as pumpkin, pumpkin and pumpkin.

So we can also call the pumpkin "North Melon":)