Remove the messy chicken oil from 500 grams of chicken liver, wash it and soak it in water for about 2 or 3 hours. Soak it more if you have time. Put water in the pot, bring it to a boil, add chicken liver, vinegar, cooking wine, onion, ginger slices, garlic slices, sugar and soy sauce cook the meat, simmer for 30 minutes, add salt, cook for 10 minute, turn off the fire, put it in the pot, cool and take it out.