1. Dice the yam for later use.

2. Put the ribs in a cold water pot, add cooking wine and ginger slices, and blanch to remove blood bubbles.

3. Add water to boil in another pot, and add ribs, yam, ginger slices and onion segments.

4. Add cooking wine, chicken essence, pepper and salt, and simmer for 1-2 hours after boiling. The stewing time depends on the size of the ribs.

Finally, sprinkle with coriander or chopped green onion and serve.

Pork ribs soup is a home-cooked soup made of ribs and vertebrae left by pigs, cows, sheep and other animals after meat removal. Besides protein, fat and vitamins, ribs also contain a lot of calcium phosphate, collagen and bone mucin, which can provide calcium for children and the elderly. Pork ribs soup is a special soup with high nutritional value. It contains a lot of protein, fat and collagen, some vitamins and minerals, and some active enzymes, which provide nutrition for human beings.