soak soybeans for 4 hours, put them in a clean container (no oil), put a clean mat under it and drip water for 2-3 times a day, and use warm water in winter for about 1 week, and cover them with a wet towel. In short, keep soybeans warm and moist, but they can't be soaked in water.

You can eat bean sprouts in three or four days in summer, and it takes about seven or eight days to sprout them in winter.