1. Prepare the ingredients.
2. Wash kelp and drain; wash duck legs and chop into small pieces; cut green and red peppers, onions, ginger and garlic into pieces.
3. Pour oil into the pot, heat it up, and add sugar.
4. Stir-fry white sugar over medium heat, pour the duck meat and stir-fry until it's about to wire.
5. Add ginger garlic, star anise, dried red pepper, and stir fry until the duck is colored.
6. The duck meat has a good sugar color and a lot of oil. Pour the kelp and stir fry.
7. Add salt, pepper, green and red pepper, onion, and 400 ml of water; bring to a boil on high heat, and simmer on low heat.
8. Collect the soup slightly and season it.
