Ingredients: lemon and water.

Accessories: appropriate amount of rock sugar.

Steps:

1, prepare the ingredients.

2. Slice lemon.

3. Put the lemon rock sugar into the bowl.

4. Add boiling water.

5. Cover the bowl with a plate to prevent the steam from floating away.

6. After soaking, put it in the refrigerator and freeze it in a fresh place for one night.