Stewed cock with wild dry auricularia auricula is not toxic, but it may contain carcinogens, because auricularia auricula itself has a high sulfide content, and some carcinogens will be dissolved during cooking, which is harmful to human body.

Wild dried auricularia auricula is produced in Changbai Mountain forest area surrounded by dense forests. The abundant sunshine during the day, the cool temperature at night, and the unique original ecological natural environment in Changbai Mountain area make Auricularia auricula have the excellent qualities of black ears, fine meat, not hard, soft but not rotten, light and refreshing, and rich gum, which are unique in Central China.