2. Wash the crab shell and open the shell. Then remove the internal organs and wash them.
3. Stir and dissolve the salt in ice water, then put the washed crab in, soak it for about 10 minute, and take it out. Chop the crab into several pieces, put them on the steaming plate together with the crab shell, and then scatter the ginger slices and onion segments on the crab.
4. After being put into the steamer, steam over medium-high fire for 10- 12 minutes. Take off the ginger onion. Let the crabs cool, put them in the refrigerator, and take them out at about 1 hour.
5. Soak shredded pepper and ginger in vinegar for 10 minute.
6. Put the cooled crab back to its original shape and put the crab shell on it.
7. Peel the crab meat and then dip it in ginger vinegar.