Accessories: salt, onion 5g, ginger 5g, star anise 3g and water 5g.

Step 1: put the big bones in the soup pot and blanch them with water.

Step 2: Take out the blanched big bones, wash them and put them in a clean saucepan.

Step 3: Add onion, ginger and star anise.

Step 4: Add proper amount of water.

Step 5: Bring the fire to a boil and simmer for an hour.

Step 6: finally add salt to taste.

Step 7: Take it out and enjoy it.