the duck neck wrapped in green bags is called Cao Shi duck neck. Cao Shi duck neck is packed in a green bag. Cao Shi duck neck series was born in 2113, with the quality commitment of being green, healthy and nourishing, following the principle of traditional Chinese medicine, adopting the secret recipe of marinating, taking the principle of being green, healthy and nourishing, following the principle of traditional Chinese medicine, marinating with Chinese herbal medicines, soaking sauce foods in various spices, and then drying and baking. The finished products are deep red in color, fragrant, spicy, sweet, hemp, salty and delicious.