1. Wash the pig lungs under the tap, peel half the white radish and spare a piece of pork.
2. Cut the white radish into small pieces.
3. Cut the pig lung into small pieces, add a little salt and wash it again.
4. Slice the pork and cut the onion into small pieces.
5. Boil the water in the pot, put it in the pig's lungs and remove the dirty things inside.
6. Remove and wash the floating foam with cold water.
7. Add white radish segments and pig lungs to a boiling pot and bring to a boil.
8. After cooking for a while, add the pork before cooking.
9. After boiling, burn for more than half an hour, and finally add salt to taste.