1. After buying sheep bones, the first thing to do is to cut off the meat on the bones and leave a thin layer.
2. soak sheep bones in cold water and blood in meat. After soaking, the sheep bones are boiled in boiling water, mainly to get rid of their dirty things.
3. Put the cooked sheep bones into the pressure cooker, then add onion ginger, cooking wine, soy sauce, pepper, sugar and cinnamon, add some salt to taste, and cook for about half an hour. After the pot is boiled, add a little chopped green onion.