Step 1: Prepare a grapefruit.
Step 2: Peel the grapefruit.
Step 3: Take the skin, slowly brush it clean, and slowly rub it with salt.
Step 3: Remove the white part of the skin, only the grapefruit skin is needed.
Step 5: After shredding, soak for 10 minute.
Step 6: Cut into fine grains.
Step 7: remove the white part of the pulp and take the solid pulp.
Step 8: Add rock sugar and grapefruit skin into the pot and fry until the grapefruit skin becomes bright.
Step 9: Add 50g of clean water.
Step 10: Boil the water for 10 minutes and then add the pulp.
Step 11: Slowly simmer for 40 minutes.
Step 12: This is the finished product, which has just been boiled and has a slightly darker color.
Step 13: Bottle.