What is the Chili oil of black residue cold noodles? Is it a carcinogen? If yes, is it harmful to buy cold noodles frequently recently?

This black residue may be oil that has been used many times.

If it is, it must be a carcinogen.

Eating it often will be harmful to your health.

It's best to eat less processed food and snacks outside.

There are more or less health risks.

It is safest and healthiest to cook and eat at home.