1

Wash the surface stains of duck eggs.

2

Lay it flat in a ventilated place to dry.

three

250g of preserved egg powder is stirred into a thin paste with water, and the duck eggs are soaked one by one.

four

Then evenly wrap a layer of dry powder, so as not to expose the eggshell.

five

Put it into a fresh-keeping bag, squeeze out excess gas, fasten the fresh-keeping bag and seal it in the cylinder for 30 days.

six

Take out the fresh-keeping bag, open it, and expose the changed eggs in the air for ventilation and annealing to remove the alkaline smell.

seven

Wash the dry paste of the epidermis.