According to the reference experience network, the duck esophagus will be crisp after cooking for 3 minutes. Put duck esophagus in water for 3 minutes, then soak it in cold water. Duck esophagus contains vitamins, calcium, iron and other minerals, which can promote human metabolism after eating. Duck esophagus has a fishy smell, and it is very easy to get impurities. Choose white without residue, not black.