1. Prepare materials, wash the hawthorn and control water
2. Add water, rock sugar
3. Stir quickly over medium and low heat until the rock sugar melts
4. Stir-fry on low heat until large white bubbles
5. Make small bubbles, add a few drops of white vinegar, and quickly turn off the heat
6. Put the hawthorn in, stir fry and coat with sugar until it's cold
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