As for the flooded duck eggs, the preservation time is not long. This water should be as salty as possible. You should add salt to the water and taste it. Only when you feel particularly salty can you put down the duck eggs and let them calm down. We have to dig some red soil when it's drained. For example, if there is red soil here, you can dig loess where there is no red soil. It is sticky. Rub some water in it. Then you put a layer of salt on the surface of duck eggs, and then evenly paste yellow mud on the outside. Burn more plant ash with straw and stick it outside the yellow mud, then put it in a plastic bag and put it in the dark. It will be all right in a moment.