Unless it is in the place where it lives, the oyster in the buyer's hand will not live for a few days, and the survival time can only be appropriately extended by 3-7 days.

Preparation: a big basin, some water and a wet cloth.

Treatment method:

1. Wash the surface of oyster with clean water.

2. Prepare a container that can hold oysters, and add a proper amount of water into it.

3. put the oysters in clear water, and the water can't pass the oysters.

4. Cover the basin with a wet cloth, and then put it in a ventilated and cool place, so that the oysters can be kept for about 3-7 days.

Note: change the water every 1-2 days, add some salt to the water, and it is best to bring water when buying oysters.