Crispy Pork Belly (Siu Yuk)

Name: Crispy Pork Belly (Siu Yuk)
Prep time: 12 h
Cook time: 1 h
Total time: 13 h
Cuisine: Chinese
Ingredients: 1000 g pork belly with beautiful layers; 2 small chunks of ginger; 2 scallions; 1 tbsp. cooking wine; 6-10 Sichuan peppercorns ( ,optional); 1.5 tsp. salt; 2 tsp. Chinese five spice; 1/2 tsp. sugar; 1 tsp. white pepper; sea salt to cover the meat; white vinegar for brushing