2, rock sugar Sydney water is a delicious dish. It has the effects of clearing away heart fire and moistening lung, facilitating defecation, relieving cough and moistening dryness, sobering up and detoxifying. Wash Sydney, peel off the skin, remove the core and cut into hob blocks for later use; Add a proper amount of water to the pot, when it is almost boiling, put the rock sugar in, heat it on low heat until the rock sugar melts, and then put the Sydney pieces in. After the fire boils, change to low fire and cook for 20 minutes.