Firstly, prepare the materials, namely, Sydney 150g and rock sugar 15g. Specifically, firstly, wash and peel the Sydney, cut off the top as a cover, then dig out the core of the Sydney with a knife and spoon, put the rock sugar in the middle, cover it, put it in a stew or a deep bowl, steam it in a steamer for one and a half hours to two hours, and wait for the Sydney. It's because rock sugar has the effects of invigorating the middle energizer and stomach, moistening the lung and relieving cough, protecting the respiratory tract, clearing away heat and toxic materials, and can be used for lung dryness and cough, dry mouth and troublesome cough, sore throat and other diseases, while Sydney has the functions of promoting fluid production and moistening dryness, clearing away heat and resolving phlegm, nourishing yin and tonifying kidney, and the combination of them has excellent effects of nourishing yin and moistening the lung, relieving cough and eliminating phlegm.