After the crab dies, slowly peel off the shell with tweezers and scalpels, and carefully remove the muscles, cartilage, viscera and contents in the crab shell, leaving only the shape of the crab shell.
In the same way, the residual meat and liquid on the four pairs of limbs of crabs were removed respectively. That is, from the movable joint of the limb shell, cut a suitable small mouth with scissors and take out the residual meat. Clamp a small bundle of cotton with tweezers to clean the bone marrow and residual liquid in the limb shell. Similarly, the muscles and residual fluid in crab claws are also removed from the movable joints. Clean up the residual liquid in the crab claw at the incision with a dry cotton ball. When pickling crabs, use the mixed powder of pickled skins prepared in advance to completely cure the cavity in the crab shell from the incision, then fill the gap in the crab shell with ointment, cover the crab shell and press it tightly, properly shape the crab, paint it with varnish, label it, and put it in a cool and ventilated place for natural air drying, so as to preserve and display crab specimens.