Preparation materials: a little vinegar, a little salt, a little eggs and a little plastic wrap.

1, wash the eggs, and then dry them or wipe them clean;

2. Then, prepare a little vinegar.

3. Then, prepare some salt.

4. Then, spread vinegar on the eggs.

5. Then, roll in a salt pan, and the eggs are covered with salt particles;

6. Then, wrap it in plastic wrap and put it indoors.

7. Complete and solve the problem.