Boil until the soup turns milky white, even if it is pig bone soup. The specific methods are as follows: 1. Preparation materials: pork bone: 2500g, ginger: 5 pieces, cooking wine: appropriate amount.

1. Wash pig bones with clear water and drain them for later use.

2. Pour a proper amount of water into the pot, put the big pig bones in, blanch them, remove them and drain them for later use.

3. Pour a proper amount of water into another pot to boil, then add the cooked pork bones and add a few slices of ginger.

4. Remove the residual blood foam after the fire is boiled, and then continue to cook with high fire for 10 minutes.

5. Turn to low heat and stew for about 3 hours, and then stew into milky soup.