According to the author, this soup will "help to 'open up the milk glands and is full of nutrients for breastfeeding mothers."  The author also said that "soya beans are believed to possess 'cooling' elements, and as such, it is more recommended to new mothers whose body complex is basically 'yang' (heaty?)"

Ingredients

200g     soya beans

500g     pig's knuckles

200g     soft beancurd

4 slices old ginger

1 tsp     salt    

Steps                                           

1. Soak soya beans overnight.  Drain before use.
2. Clean and wash pig's knuckles, removing hair, if any.  Cut into big pieces.
3. Bring 2 litre of water to a boil.  Add pig's knuckles, soya beans and ginger.  Cover and boil contents for 15 minutes over high flame.
4. Add the whole beancurd and simmer soup over medium-low flame for 3 hours.
   Season with salt.