Perut Babi Rebus ala Shanghai (Hong Shao Rou)

Bahan-bahan (8 porsi)

• 1 1/2 pounds perut babi tanpa lemak dan berkulit
• 2 tablespoons oil ((any neutral oil, such as canola, vegetable, or avocado oil))
• 2 tablespoons rock sugar ((or granulated sugar))
• 1/3 cup Anggur Shaoxing
• 2 tablespoons kecap
• 1 tablespoon kecap hitam
• 2 -3 cups water ((see note))