1. Prepare the ingredients, a large piece of beef, and five spices.
2. Slice the beef, then beat it loose with a hammer. Add 3 tablespoons of cooking wine and 2 tablespoons of salt and marinate for 30 minutes.
3. Add water to the pot, add peppercorns, star anise, cinnamon, ginger, oyster sauce, sugar, light soy sauce, 1 tablespoon salt and 3 tablespoons cooking wine and bring to boil.
4. Wash the marinated beef slices, pour into the pot, add the five-spice powder.
5. After cooking for 20 minutes, turn off the heat and let the beef soak in the soup overnight.
6. Place the beef and spices on the grill. Bake at 70 degrees for 6 hours.