1. Blanch the tomatoes, peel and dice
2. Put water in the pot, add pork ribs, sliced ginger, green onion, cooking wine, blanch water to remove fishy and blood foam
3. Add water to the pot, pour the ribs, and simmer for 90 minutes
4. Add white vinegar, diced tomatoes, turn to high heat and cook for 2 minutes
5. Add chicken powder, salt, white pepper and stir well
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