It is not necessarily a sign of bird flu that frozen chicken wings are dark purple with blood. It may be that in the process of killing chickens, local congestion is formed due to the random flapping of chickens, which usually does not affect eating. If you feel uncomfortable, you can cut a knife where there is blood stasis. After breaking the epidermis, it is easy to wash off.

But don't eat chicken wings if they are smelly and moldy. Before cooking chicken wings, make sure to cook them thoroughly to eliminate possible bacteria and parasites. If the cooking time is not long enough, the blood inside may not be cooked thoroughly and solidified, which may cause the color of the meat to look like congestion. If you find blood in the chicken wings, you need to continue cooking until cooked.

If you have doubts about the quality and safety of chicken wings, you'd better consult a professional or conduct relevant tests.