2. After the water is boiled, add salt, sugar and pepper shells until the water is cold (try it after the salt melts, not too weak).

3. Put beans, ginger slices, and some garlic cloves into the container, and press stones on them (so that the beans will not surface).

4. Put the cold salt water into the container and cover it (the water must not pass through the beans).

After a week, the color will turn yellow and it will be fine (it will cool down after a long time).