Call a pot of warm water, put the clam into the water, add salt and oil, and a layer of oil can be seen on the surface of the warm water. This is to isolate it from the outside world. Without oxygen below, Meretrix meretrix will breathe faster because of lack of oxygen. Let Meretrix meretrix spit out the sediment as soon as possible and let it stand for two or three hours. Or turn the water by hand, and the sediment can be cleaned in a few minutes.
Shellfish is also good for refining and moistening dirty. Everyone can eat it. It is especially suitable for people with high cholesterol and hyperlipidemia and people with goiter, bronchitis and stomach diseases.
Shellfish such as clams are very delicious. Never add monosodium glutamate or more salt when cooking, so as not to lose the flavor. Shellfish should spit sand and eat it when it is ripe. Shellfish such as clams are cold, and those with deficiency of spleen and stomach should not eat more.