The practice of winter melon and yam ribs soup is very simple. First, the ribs are poured into cold water until they boil and bleed. Then put the ribs in a stew pot, pour some water, add ginger slices and stew together. When the soup is almost stewed, add yam, 10 minutes, add wax gourd, and optionally add proper amount of jujube and medlar, and finally season with salt and pepper.
Yam should be snow-white in cross section, and don't buy it if it shows yellow rust. There should be no abnormal spots, mucus or germination on the surface of yam. Cut yam needs to be soaked in salt water to prevent oxidation and blackening.