Broth is a seasoning used by princes and nobles in the era when there was no monosodium glutamate and chicken essence. At that time, it was stipulated that it was a pure white thick soup made of a chicken, a duck and many pig bones and cow bones. Nowadays, the broth used for folk cooking is very simple.

Soup is not for sale.

You can buy a chicken rack at home (the remaining chicken legs, chicken breasts and chicken wings are all taken out from the slaughterhouse, and Shanghainese call them chicken shells), and the duck rack is cooked with pig bones. Cook slowly with a small fire and use a casserole. This is more practical.