1. Slice the ginger; peel and cut the carrot in piece; cut the pork belly in half.
2. Heat the pot with oil, sauté the ginger, pan fry the pork belly until golden brown. Pour the sake, vinegar, water, sugar and soy sauce, cover the lid and bring to boil, add carrot. Remove the scum, cover the oil absorbing paper, turn to low heat and simmer for 25 to 30 minutes.
3. Place eggs into cold water, boil the eggs until cooked. Immerse eggs into the ice water to cool down. Peel away the shell, immerse eggs into the sauce, and soak for half an hour.
4. Remove the oil absorbing paper, transfer the pork belly, eggs and carrot to the plate.
5. Bring the sauce to boil, add spinach cook for a while.
6. Cut the pork belly into pieces; cut the egg in half; cut the spinach into sections, then place the carrots, pork belly, egg and spinach on a plate, and then pour the soup. Done.