2, wash the prepared 500g tube bone to remove blood, take off a part of lean meat, not too much, to prevent too much minced meat in the soup, affecting the hue.

3. Then put the tube bone into a pressure cooker, and pour in a proper amount of tap water to boil out the bone marrow. Then take another cauldron of water and heat it to a medium temperature, and then pour all the water in the pressure cooker into the cauldron. The total water in the front and rear cauldrons is 10 kg.

4. Then boil the fire until it boils, then add coarse salt, weidan and chicken powder, turn to low heat and cook slowly. After 3 minutes, turn off the fire, and the soup base is finished here.