Hello! Rock sugar Sydney is mainly used for moistening lung and relieving cough. For people with lung diseases, it is more appropriate to drink it in summer. I believe you have heard the phrase "winter disease is cured in summer". Patients with lung diseases often get sick in winter and spring, but summer is often peaceful, so it is also a good time for recuperation and treatment. Of course, as long as healthy people drink moderately, it is also good for their health.