Cut the salmon into bite-sized pieces.
Thinly slice the onion, Cheongyang chili pepper, and red chili pepper.
In a pot, bring soy sauce, water, cooking wine, sugar, and minced garlic to a boil.
Once the marinade has cooled, place the salmon, vegetables, and marinade in a container.
Let it marinate in the refrigerator for at least 6 hours.
Serve the marinated salmon on a plate.