1. Ingredients: yam, beef bone, beef shank,Carrot, ginger

2. 1. Cut the yam and carrot into dice, slice the ginger.Cut the beef shank into pieces and wash it with hot water; then boil to remove impurities.

3. 2. In a pot, add boiling water, blanch the beef shank, then wash it clean.3. Put half a glass of water in a pressure cooker, place the beef bone and ginger slices inside, add rice wine and red vinegar (the amount of water should be slightly more as beef bones are hard to cook through).Cover the lid and bring to a boil, then simmer for 40 minutes.4. Rinse the pressure cooker with cold water after cooking, open the lid when the pressure valve drops, add yam and carrot, cover the lid and let it simmer for another 20 minutes. Season with salt before serving, sprinkle with scallions and let it sit for a moment.

4. Ready to serve