Shrimp line is the body tissue of shrimp. Generally speaking, the digestive system of shrimp such as intestine is easy to accumulate heavy metals, so the shrimp line should be pulled out before cooking. The shrimp line on the back of shrimp is the waste that shrimp has not excreted.

Shrimp line removal is not only because there are dirty things in the digestive tract of shrimp, but also because it affects the taste, especially when steamed in white and braised in wine. Shrimp thread contains bitter substances, which will mask the sweetness of fresh shrimp under the action of heat. Removing the skin of shrimp is not only because there are dirty things in the digestive tract of shrimp (this is the same as removing fish gills and crab gills, but it is basically harmless to human body), but also because the skin of shrimp affects the taste, especially when steamed in white and braised in wine. Shrimp skin contains bitter substances, which will mask the sweetness of fresh shrimp under the action of heat. It is recommended to remove the shrimp skin when cooking.