Best preparation of gravy (primary gravy): Wrap spices (ginger, cinnamon, fennel, dried tangerine peel, clove, Amomum tsaoko, Rhizoma Dioscoreae Septemlobae, pepper, vanilla) with gauze, add 1 bowl of broth (bone soup) and 2 bowls of clear water, put them in a pot, and cook on low heat for one hour. Pay attention to hydration and don't dry-burn. Add sugar water (keep boiling for 5 minutes and keep stirring). Note: The sugar here is not sweet. Add soy sauce and stir well (cease fire for 5 minutes) ...