How to deal with the old soup for cooking pig's head meat?

The raw materials for cooking pig's head meat are balsamic vinegar, cooking wine, fresh ginger, soy sauce, salt and fresh pig's head meat, and the ingredients are star anise, Amomum tsaoko, cinnamon, angelica dahurica, clove, kaempferia kaempferia and long pepper, which are very delicious.

Boiling pig's head meat is very important for the treatment of broth, which can make the flavor of dairy products better. Broth contains fat degradation products and protein degradation products, and there are a lot of flavor substances, which is the main reason for making dairy products taste better. It is easy to be used by microorganisms during storage, which makes the broth deteriorate. Therefore, it is necessary to remove the residual residue and store it in an environment of 0~4 degrees to make the old soup taste better.