Trim the crab legs and clean the shell under running water using a brush.

Mix 150 ml water with 4 tbsp vinegar and pour over the crab. Toss gently.

Finely chop the white part of the green onion and set aside.

Prepare the seasoning by mixing soy sauce, red pepper powder, sugar, vinegar, minced garlic, and minced ginger.

Drain the brined crab and mix it with the prepared seasoning.

Add the chopped green onion and sesame seeds to the seasoned crab and mix well.