It is made of green onion, ginger, dark soy sauce and oyster sauce, spread evenly, then put water and rock sugar in the pot to collect the juice. The specific method is as follows:

Ingredients that need to be prepared in advance include: 1 duck, 10 grams of green onions, 10 gingers, 50 grams of dark soy sauce, 100 grams of oyster sauce, 200 grams of rock sugar, and 1000 grams of salad oil.

1. Cut the whole duck in half and set aside.

2. Put the duck in a basin, add onion, ginger, dark soy sauce and oyster sauce.

3. Stir evenly to coat the duck evenly and marinate for more than 2 hours.

4. Put the duck into the pot, add an appropriate amount of water, add rock sugar, boil over high heat for 40 minutes and then reduce to low heat.

5. The juice becomes sticky.

6. Serve out and complete.