How to pickle salted crabs?

There are many salting methods for salted crabs, and each place has its own salting method. As I am from Ningbo, I would like to introduce the pickling method of Ningbo salt water crab:

Get some boiling water and put it in a container, the requirement is that crabs can be submerged;

Add salt, the amount of salt generally depends on personal taste and curing time. People in Ningbo generally put salt until the water can't dissolve more salt, even more, depending on personal taste, and then let the hot water cool;

When the hot water cools down, we will deal with the crabs (when buying crabs, we should buy female crabs, which are relatively fat, and then look at the traces on the crabs' stomachs. The deeper the trace, the better). Crabs must be washed clean. When washing, it is best to brush the crab clean with a brush, then clean all the sediment on the crab's horns with a toothpick, then drain the water and put it in the refrigerator after the prepared salt water is completely cooled.