Method 1: Keep king crabs in the refrigerator. When buying king crab, you must buy fresh king crab and tie its feet with rope. Then put the king crab in the refrigerator, and the temperature in the refrigerator should be kept at 5~ 10 degrees. Then cover the king crab with a wet towel. This will keep the king crab alive in the refrigerator.

Method 2: You can also prepare a 50 cm high plastic bucket, put the king crab in it, and then fill it with water to submerge the king crab by half, so as to moisturize the king crab. You can't drown all the king crabs with water, because there is no aerobic equipment in them.

Method 3: If the king crab we bought is not ready to be cooked now, we can leave our bathtub empty and put it in the bathtub, because the bathtub is smooth and the king crab can't escape. Just drown the water in the bathtub in the crab's claws. Save the king crab in this way, and the king crab will not die.