1, choose 1 long beans first. Never pinch off both ends of long beans. Wash them and dry them.

2. Look for 1 large-mouthed containers with lids, glass and ceramics can be used, washed and dried.

3. Boil water and put salt. The salty taste is similar to that of a dish.

4. If you like spicy food, you can add pepper and dried pepper, and when the water is cold, add long beans and seal them.

5. 1 Time takes about 1 week. After that, the water will be sour and you can eat it in two or three days.