Get rid of those that are black or brownish black. It's best to squeeze them and clean them. Although they don't bite, their internal organs always feel uncomfortable. Just get rid of them and clean them.

The rest is free, find your favorite way to eat. Generally, restaurants are steamed with garlic fans, and Baidu search can find a lot.

It's much more delicious when it's fresh, and it's always unsatisfactory when it's frozen.