The practice of long summer eggs:
1, take a clean towel, pour white vinegar, scrub the duck eggs and dry them.
2. Prepare salt and strong wine.
3. Pour the white wine into the bowl and soak the duck eggs in the white wine 1 to 2 minutes.
4. Put it in a bowl with salt and wrap it with a layer of salt.
5. Put it in a sealed bag and sprinkle salt on the duck eggs. There can be more salt.
6. Expose yourself to the sun for a day, then put it in a fresh-keeping bag and tie your mouth. It can be eaten in a cool and ventilated place for about 1 month to 40 days.