1. First, use the bathtub as a pond temporarily, gently put in the bought fresh crabs, and the injected water just passes the crabs, so that they can stand up and breathe. According to the time required for preservation, put a small amount of small fish and shrimp into the water.

2. If you don't have a bathtub at home, you can put crabs in a tall plastic bucket/basin with smooth inner walls. Be careful not to stack them. Just add water to half the height of the crab. You can't bury all the crabs. Too deep water will make them unable to breathe.

3. Pickled live crabs can also be put in the refrigerator, but pay attention to the method. First, find a foam box with a suitable size according to the freezer of your refrigerator, then tie the legs and feet of the crab and put them in the foam box one by one, and then add the water that has been on the surface of the crab to the box. Finally, cover the foam box and put it in the freezer.