1. Chop the duck and wash it.
2. Boil the duck chunks in the pot to remove the blood.
3. Stir-fry sugar with white sugar in a hot pan with cold oil.
4. The blanched duck pieces are quickly fried over high heat and evenly coated with sugar.
5. Add garlic, ginger, star anise, fennel, chili, and salt and stir fry.
6. Pour a bottle of beer.
7. Bring the beer to a boil.
8. Put in a casserole, put a few cloves of garlic, and boil for 2 hours on medium and small heat.