The materials that need to be prepared in advance are: 1000 grams of pork bones, 60 grams of dried vegetables, 2 candied dates, appropriate amount of tangerine peel, appropriate amount of salt, and appropriate amount of water.

1. After dry-cleaning the vegetables, soak them for an hour and remove them.

2. Put dried vegetables and candied dates into the clay pot.

3. After the water in the pot boils, add the pork bones and cook.

4. Rinse with running water. Doing this can remove the bloody smell and foam from the pork bones, making the soup more delicious.

5. Put the pork bones into the clay pot. Cover, reduce heat to simmer and simmer for an hour and a half.

6. Add salt to taste.

7. Serve it up.