Tips:
1. Soak black beans in advance.
2. Boil black beans and bones in water.
3. Clean the pond lice and fry them in oil to remove the fishy smell.
4. Add the pond lice to the cooked bone soup, then boil it on high fire and stew it on low fire for two hours.
I usually use the pressure cooker and soup button to turn off the fire in advance, because it will crush the fishbone!