Sichuan Crispy Skin Duck

• 4 star anise
• 1 duck (fresh)
• 1 two cinnamon stick
• 1 one cube ginger
• 1 scallion
• 1 egg (white)
• 16 ml dry sherry
• 12 gr coarse salt
• 8 gr cornstarch
• 6 gr sichuan peppercorns