Light dry sea cucumber is not dry sea cucumber without salt. Generally, it means that dry sea cucumber, which contains salt in the sea, is light dry sea cucumber, with a swelling amount of about 1 kg. Salt-free sea cucumber refers to the top dry sea cucumber made by removing salt from light dry sea cucumber, with a dark gray color and a swelling amount of about 17 kg, which can be distinguished from the color. Another salt-free sea cucumber is not light and full in appearance, and it has nothing to do with its size. It is mainly bullish.