Material preparation: grapes, rock sugar, salt, flour, pots, cans, plastic wrap, etc.

1. Peel the grapes one by one, don't spoil them, add salt and flour, and soak them in water 15 minutes.

2. Drain the washed grapes and put them in the jar.

3. After adding grapes, add rock sugar.

4. Add a layer of plastic film on the bottle cap.

5. Cover the lid and tighten the lid.