1. Ingredients: half a lemon, 1500ml of cold water, 3 tablespoons of honey (50ml), 25g of rock sugar.

2. Wash the lemon and slice it into slices.

Because it needs to be soaked with the skin on, it is recommended to use a small brush to clean the lemon.

3. Boil the rock sugar in water and put it in a container to cool.

4. When the water temperature is below 60 degrees, put the lemon slices into the water.

Excessively high temperatures will destroy the vitamins in lemons.

)5. When the temperature is lower than 40 degrees, add honey and stir evenly.

(High-temperature hot water will destroy the active ingredients in honey.) 6. Place it in the refrigerator for 3-4 hours before drinking.