Rub the cucumber with 1 tbsp of coarse salt, rinse thoroughly, cut into thirds, then quarter each piece and remove the seeds. Slice thinly.

Mix the sliced cucumber with 1 tbsp coarse salt, 2 tbsp sugar, and 2 tbsp vinegar. Let it marinate.

Prepare the crab sticks by cutting them into thirds and slicing thinly or shredding them.

Squeeze out excess liquid from the marinated cucumber and combine it with the prepared crab sticks.

Add 3 tbsp mayonnaise and mix well. Then add 1 tsp mustard and mix again. Adjust seasoning to taste if needed.