Get your ingredients ready.
Cut the pork neck in half lengthways and sprinkle lightly with salt and pepper.Tip: Cutting it in half helps it cook faster and makes it easier to handle. In a small frying pan, heat the vegetable oil, cinnamon, star anise, fennel seeds, and cloves over medium heat for about 30 seconds until fragrant.
Add the grated ginger and garlic, and fry for another 30 seconds.
Stir in the Shaoxing wine, dark soy sauce, honey, hoisin sauce, and, if using, the fermented ingredient. Simmer gently for 1 minute, then remove from the heat.
Prepare a plastic bag for marinating the pork. Tip: I usually use the free vegetable bags from the supermarket! Set aside 2 tablespoons of the marinade for later. Pour the remaining marinade into the bag with the pork, seal it tightly, and give it a good massage to ensure the pork is well coated.
Refrigerate the pork for at least 3 hours, but ideally 8 to 12 hours. Tip: To avoid leaks, place the bag on a plate or in a container. Once the pork is marinated, preheat your grill to 220°C. Place the pork on a baking tray lined with parchment paper and grill for 10 minutes.
After 10 minutes, turn the pork over, brush it with 1 tablespoon of the reserved marinade, and grill for another 10 minutes.
Turn the pork again, brush with the remaining marinade, and grill for a final 10 minutes.
Once the pork has a lovely brown colour all over, remove it from the grill and cover with foil. Let it rest for 10 minutes.
Slice it up and enjoy!