1. Wash the ribs, put them in a pot, add some water, and bring them to a boil.

2. Pour out the water for cooking ribs and wash off the floating foam on the surface.

3. Put the ribs in a crock, add some water and drop a few drops of white vinegar. When the fire boils, turn to low heat and simmer.

4. Mushrooms are soaked in cold water.

5, about half an hour, add mushrooms, continue to simmer slowly, about an hour, the soup is thick, poke the meat with chopsticks, it is easy to poke, indicating that the stew is good, add the right amount of salt and sprinkle with onions.