It's simple. Everyone can do it. 1. Cut the radish or vegetable stem into small pieces and dry it (don't dry it, just let the water cool almost). If there is water, it will go bad easily and taste bad. 2. Prepare a bottle (the size is up to you, the bigger one is better, and the bigger one can be decorated more, hehe). 3. Pour the cold boiled water into the bottle. Generally salty (water is 1/2~3/4 full). 4. put the cold-dried radish in the bottle for two or three days, and put it for a few more days if you want to be sour. It is best not to eat directly. Not delicious enough. You can add soy sauce+chopped pepper+cooking oil+monosodium glutamate and mix well. And peppers can also be put in the whole bottle, which should be very spicy and delicious. Note: Ginger is usually kept in a bottle, and the taste will not go bad easily after a long time. Generally, this kind of sour radish is better cooked in winter and easy to deteriorate in summer.