Preparation materials: container, clear water, edible salt and salad oil.

1, pour a proper amount of water into the container, and then add the bought clams.

2. Sprinkle a small amount of salt into the container, and then stir evenly to dissolve the salt. Salt is added to simulate the growth environment of Meretrix meretrix, so that it can open its shell and spit sand.

3. Drop a little salad oil and water to form an oil film to isolate the air, so that Meretrix meretrix lacks oxygen and accelerates the sand spitting process. Let stand for 2-3 hours.