Recipe in detail: 1. Cut pork into pieces, salting pork with half spoon salt, half spoon light soy sauce, 2 spoon cooking wine, 1/4 custard powder. Marinated for 10 minutes. 2. Add an egg and mix, add some corn starch. Please make sure every piece is wrapped. And use sieve screen out the powder. 3. Heat wok and heat 500ml oil to 50% done, fry pork until they are become golden brown. Normally it takes 3 minutes, then take them out. Heat the oil with high temperature, fry pork again for 1 minute to make their skin crisp. 4. Make sweet and sour sauce: Boiled 3 spoon tomato sauce, 2 spoon white vinegar, 2 spoon brown sugar, half spoon light soy sauce, half cup water together. Stir constantly and add starch powder. 5. In a heated pan, sautéed sliced ginger, chopped spring onion and garlic, green pepper and red bell pepper in 1 spoon oil. Then pour sweet and sour sauce, simmer add starch powder while simmering then pour into the pork, Serve hot. More Chinese cooking information, please click: https://www.chinahighlights.com/travelguide/chinese-food/cooking.htm