1, pork knuckle ginger soup can't be eaten. The remaining soup can be frozen and stored, and it can be reused for cooking pig's trotters next time.

Of course, the premise of reuse is to ensure that the soup has not gone bad. If the soup goes bad, it can't be used any more.

3. If there is not much soup left, it can also be used to make soup and pour rice, or to pour noodles, which tastes good.