1. Ingredients: 500 grams of pork ribs, 300 grams of winter melon, 500 grams of yam, appropriate amounts of onions and ginger.

2. Blanch the ribs in water. Wash the blood powder.

3. Put the ribs into the pressure cooker. Add salt. Scallions. Ginger slices. Breathe for fifteen minutes.

4. Put the ribs and soup into a large spoon. Bring to boil and add yam. After ten minutes add the winter melon. After five minutes, add jujube and wolfberry,

5. Turn off the heat after boiling. Add salt, chicken essence, pepper and MSG and serve.