Wash the cabbage thoroughly and cut it into appropriate pieces.
Soak the cabbage in coarse salt for about 1 hour.
Rinse the salted cabbage well and drain excess water.
Chop green onions, garlic, and ginger.
Mix the cabbage with red pepper powder, minced garlic, minced ginger, salted shrimp, salt, and sugar until well combined.
Place in an airtight container and let it ferment at room temperature for 1-2 days, then refrigerate.