Step 1: In a pot, cover pork with cold water. Bring to a boil, then simmer for 5 minutes. Drain and rinse to remove impurities.
Step 2: Heat oil in a pot. Add sugar and cook until melted and amber. Add pork chunks and sear until lightly browned. Toss in all spices (star anise, cinnamon, Sichuan peppercorns, etc.) and stir until fragrant.
Step 3: Add soy sauces, Shaoxing wine, and water. Bring to a boil, then simmer covered on low heat for 1.5–2 hours until pork is tender.
Step 4: Remove pork, chop and shred into small pieces, and mix with 2–3 tbsp of the reduced braising liquid. Set aside.