The materials that need to be prepared in advance are: chicken breast 200g, vermicelli, onion, ginger, millet pepper and Flammulina velutipes 300g each. Specific practices are as follows:

1. Tear the chicken breast into filaments.

2. Add broth to the pot, add shredded chicken and millet spicy, add chicken essence, salt and white vinegar to taste, and cook into a slightly sour and spicy chicken soup.

3. Add vermicelli and boil.

4. Add Flammulina velutipes and bring to a boil.

5. Sprinkle with chopped green onion.