1. Prepare ingredients.
2. Beat the eggs in a bowl, grease the non-stick pan, pour in the egg liquid, and spread into an egg cake.
3. Cut into even diamond-shaped pieces for later use.
4. Chop the leeks and set aside.
5. It's a very important step to raise the pot and burn the oil until it smokes.
6. Pour the balsamic vinegar.
7. This step is called "Vinegar", an important step for sour noodle soup.
8. Immediately pour in the right amount of boiling water, about 1.5 liters
9. Add salt, five-spice powder, chicken powder, and sugar to taste. After boiling, simmer for 2 minutes on low heat to add more flavor.
10. The longxu noodles are cooked with water once.
11. Put it into a bowl.
12. Pour sour soup.
13. Sprinkle with chives and serve with egg skin.
