Remove the black skin from the jellyfish skin. First, soak jellyfish skin in clear water for 2 hours, and then scrub it. After scrubbing, peel off its thin brown skin. Slice jellyfish skin and soak it in concentrated brine with a concentration of about 50% for about 15 minutes. Pour out the salt water and replace it with clean new salt water. Rinse the sediment with salt water for three times, then soak it for 15 minutes to wash off the black skin and sand on the jellyfish skin.

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