In terms of nutrition and health, rock sugar is the best, and the large ones are better than the small ones. They are sold in supermarkets. After foaming, wash the white fungus and wash the lotus seeds (it is recommended to keep the lotus core, because it can remove fire and nourish the liver. If you really don’t like its bitter taste, just remove it), add water, bring to a boil over high heat, and add rock sugar according to personal taste. Simmer on low heat for 1-2 hours. In autumn and winter, you can add some wolfberry, barley, snow pear (nourishing lungs), etc. I usually stew it on weekends. The longest time I stewed it was 4 hours. The white fungus turned into a soup and it felt like it melted in your mouth