1. Wash the green plums and soak in water with two tablespoons of salt for two hours.
2. Grill with water, add green plums, add a spoonful of salt, and cook for 5 minutes on low heat.
3. Remove the plums and let cool.
4. Remove the core.
5. Put green plum meat and sugar in a non-stick pan, add half a teaspoon of salt, turn to a low heat and simmer for ten minutes.
6. Stir it from time to time, and let it cool down and bottle it when the water vapor evaporates. (The bottle should be water-free and oil-free)
7. Spoon a spoonful of green plum sauce, add warm water, sour and sweet, with a slight bitterness.
8. The soft and waxy plum pulp is very delicious.
