1. If it's boiled water, just boil it for 8 minutes. If it is cold water, it will take a long time, which should take 20-30 minutes.

(suggestion: it is best to boil water. And it is best not to exceed 8 minutes and not to be less than 6 minutes. If it takes more than 8 minutes, the nutrition of the egg will be lost to some extent. If it takes less than 6 minutes, there may be some parasitic bacteria that are not good for the human body.)

We put the duck eggs in a pot with cold water and cook them with low fire, so that the duck eggs won't crack.

When cooking cracked eggs, put some salt in the pot first. Salt can solidify protein and prevent protein from flowing out. Adding a little vinegar can also prevent protein from flowing out. After the water boils, cook it for 5 minutes with low fire and scoop it up with a colander. If the water on the surface of the egg dries up quickly, it means that the egg is cooked.