1. material: half a duck, 50g of Agrocybe aegerita, 20g of figs, 8g of chestnuts, 0g of medlar10g, 3g of ginger and 2g of red dates.

2. Wash Agrocybe aegerita, soak it in warm water for about 10 minute, cut off the head pedicle and cut it into sections;

3. Wash and chop the old duck. Boil water in a pot. After the water is boiled, put the old duck pieces into the water and blanch them.

4. Add 8 bowls of water to the soup pot, and put the old duck, fig, ginger, Agrocybe aegerita, chestnut and red dates into the pot together;

5. After the fire is boiled, turn it to low heat 1.5-2 hours, add Lycium barbarum into the soup 10 minutes before turning off the fire, and finally add salt to taste.