Formula: 1000g big bone, two corns, two potatoes, a carrot, a few slices of ginger, two star anises and a proper amount of salt.

1, put the pot in cold water and cook the big bones.

2. Cook until the foam comes out.

3. Cut the onion and ginger slices.

4. Wash and cut the materials.

5. Wash the boiled big bones with cold water, and put them into the pressure cooker together with other materials. When the water does not reach all the ingredients, just add the onion, ginger slices and two star anises, and press the button to the corresponding position of the pressure cooker.

6, it will take about half an hour, and finally put salt in the pot.