(1) Rinse the seaweed with water, blanch in hot water, remove and cool, then drain and set aside.
(2) Dissolve 1/4 tablespoon of salt in 2 cups of water and set aside. Wash the apple, cut it open to remove the core and stem, cut into eight equal wedges, then slice horizontally into 0.3 cm thin pieces. Soak the slices in the salt water for 30 seconds, immediately remove and drain.
(3) Wash and slice the cucumber and carrot separately. Add 2 teaspoons of salt, mix gently, and let stand for 10 minutes. Then drain off the salt water and set aside.
(4) Combine all the ingredients and seasonings, mix well, and serve.