Stewed soup is a cooking method with a short cooking time, usually between 1 and 2 hours. Old fire soup is a long-term low-temperature cooking method, which can last for several hours to dozens of hours or even longer.

Stewed soup is suitable for some tender ingredients, such as meat and vegetables. Stewed soup is generally delicious and clear. Laohuo soup can fully release the nutrients in the ingredients and make the soup more rich and mellow. Laohuo soup is often used to stew some hard ingredients, such as chicken bones and beef bones, to extract the taste and nutrition of bone marrow.