1. Wash the shrimp and remove the shells, pick out the shrimp thread, and marinate with salt, cooking wine, and white pepper for 15 minutes. Peel the yam, cut into small cubes, add starch and coat.
2. Pour oil in a hot pan, add shrimp and yam and fry until cooked.
3. Remove it and put it in a bowl, take another bowl, add salt, sugar, white vinegar, tomato sauce, water, and a little starch to make a juice.
4. Pour a little oil into the pot, add the prepared sauce, simmer for 1 minute on medium heat, add the shrimps and yam and slowly coat it well.
