1. Take old terrier out of watercress, knead it into long pieces, wash it and soak it in light salt water 10 minute.

2. Dry watercress and shred ginger.

3. Put water in the soup pot and add shredded ginger.

4. Pour in proper amount of cooking oil and bring to a boil.

5. After the water is boiled, put the watercress into the pot.

6. When the water boils again, put the salted duck eggs into the pot and cook them with fire.

7. Finally, add some salt to taste.

8. Add half a spoonful of chicken essence to refresh.

9. Pour a little sesame oil to improve the taste after turning off the fire.