Ingredients: a watermelon weighing 6-7 kg, glauber's salt 1 kg (sold in major pharmacies, very cheap).

1. Prepare a watermelon weighing six or seven kilograms.

Wash watermelon

3. Dry the watermelon with a clean towel

4. Cut a small piece on the head of watermelon.

5. Dig out the pulp in the watermelon, dig it clean and leave the juice in it.

6. Pour in 1 kg of mirabilite.

7. Watermelon should account for two-thirds of watermelon. If it is not enough, you can add some mirabilite or watermelon juice.

8. Cover the cut-off cover

9. Insert the bamboo stick tightly around the cover and seal it.

10. Put the watermelon in a cool and ventilated place. /kloc-After 0/0 days, the surface of watermelon will be frosted, so brush it with a brush. This is watermelon frost.