Specific steps:
The yellow mud is dried and mashed first; Wash duck eggs and dry them naturally; Add 5 grams of boiling water to salt and simmer; Pour salt water and yellow wine into the yellow mud and stir. If the yellow mud is too hard, soak it for a while and stir it into a paste. Marinate duck eggs in it, so that they are evenly covered with yellow mud, and then put into the jar, layered; When all the duck eggs are put into the jar, pour the mud left in the basin into the jar, gently smooth it with your hands to isolate the duck eggs from the air, then cover them with plastic wrap, tie them with rubber bands, fix them, seal them and put them in a cool place.