Step1:Blanch the ribs first. Drain the water again. Put the bones and zucchini in cold water. Ginger slices. Turn off the heat and cook for 1 hour after rolling. Beat in the preserved egg 10 minutes before turning off the heat. Stir it up. The soup turns golden yellow. It also smells like egg yolk.
Cooking tips:There are skills in making delicious dishes.