1. If the bought crabs need to be preserved for 3-5 days, you can use a deep hand-washing basin, a large plastic bucket or a bathtub at home, and then pour in clean water. If tap water is used, it is recommended to dry the tap water for about 2 hours first, and the water should not be placed too deep, so that the crabs can just stand up.

2. If it needs to be stored for a long time, it is recommended to put a small amount of small fish and shrimp in the cultured water, which can make the crabs survive for 7 days or even longer, and the survival rate of good quality hairy crabs can reach over 95%.

3. It can also be stored in the refrigerator. First, bind the crab's feet and pliers and put them in the cold storage layer of the refrigerator. Cover the crab with a wet towel, and gently touch the crab's eyes every 1 day. If it is insensitive, it should be eaten immediately, and the crab with sensitive reaction can continue to be stored.

4. Besides live crabs, cooked crabs are also acceptable. Put the steamed crabs in a clean washbasin and cover them with a wet towel. Note that the temperature cannot exceed 20℃ and can be stored for 1-2 days; You can also wrap the cooked crabs with plastic wrap, put them in the refrigerator for 3-4 days, and take them out and cook them with water before eating. You can also peel off the crab meat and store it in the refrigerator, which can be used to make dishes such as crab-yellow tofu and crab-yellow steamed buns.