1. Wash the tube bones, blanch water in a boiling pot, let the blood foam boil out, pour out the water and clean the tube bones. Soak the corn for a while, wash and cut into pieces
2. Rinse the yam, put on disposable gloves, peel and wash, hob blocks, and put them in a basin filled with salt water
3. Put the tube bones, corn and ginger in the pot, add water, and drop half a teaspoon of vinegar
4. Bring to a high heat, turn to medium and low heat and boil for 40 minutes, add yam, and boil for another half an hour
5. Rinse the wolfberry and put it in, boil for 5 minutes, add salt and monosodium glutamate, turn off the heat.
6. Light
Tips:Wear gloves when handling yam, or you will feel itching, and put the yam in light salt water to prevent oxidation and blackening.
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