1. Go to the supermarket to buy a fresh lemon, with better luster. It is best to buy the so-called imported lemon, which is obviously better than the domestic one.

2. After going back, wash it, dry it with a paper towel, and freeze it in the refrigerator for two hours, neither too long nor too short. If it is short, it will be frozen, and it will be too difficult to cut it for a long time.

3. Slice the lemon into thin slices on a clean fruit board with a slicer. One lemon is about 15 to 20 slices. This process is faster, and then put it into a fresh-keeping box with a lid.

4. Put it in the freezer of the refrigerator. When it is needed, cool the boiled water or directly use mineral water (pure) water, etc., with the size of half a piece per glass of water as appropriate. If you use a pot, you can put one or two pieces.

5. You can add honey or rock sugar to taste.

6. Don't use overheated blisters, which will lose the fragrance and nutritional value of lemons. In summer and autumn, this method can make a lemon drink delicious lemonade for half a month.