1. Soak the beans. Use intact beans, wash them several times with water, add half a bowl of water, and soak them overnight.

2. Prepare equipment. Find an open plastic bottle and make it an open plastic bottle. Wash and set aside. Prepare another string or rubber band, and use part of the gauze after taking the mask apart. Also find a cardboard box that can hold the plastic bottle.

3. Officially sprout bean sprouts. Pour the soaked beans into a plastic bottle, cover it with a layer of gauze, tie it with a string or rubber band, and then add water, just enough to cover the beans. Leave it standing to soak for 1 to 2 minutes.

4. Turn the plastic bottle upside down and filter out the water in the plastic bottle. Wait until there is no obvious water flow. Usually it takes 1 to 2 minutes.

5. Place the plastic bottle squarely in the prepared carton, close the carton mouth, and seal the carton mouth with a clip or the like so that the carton is ventilated but not exposed to light.

6. Take the bottle out of the carton, add water to the plastic bottle, soak it, pour water, and then put it back into the carton.

7. Finish harvesting bean sprouts. Generally, the beans will grow into bean sprouts in about a week