Materials that need to be prepared in advance include: 1000g of grapes, 500g of rock sugar, and 1 containers.

1. Wash the glass container and dry the water.

2. Remove the grapes one by one, wash them with clean water, and then dry them.

3. Pinch the grapes with your hands to break the skins and put them into the container to cover the bottom.

4. Add rock sugar, do not fill it too full, and seal it for fermentation.

5. After the grape juice comes out and the juice below is a little separated from the grapes, squeeze it dry with a sofa and discard the skins.

6. Pour into the cup and you are done.