How do you make your local crayfish? How much is a catty?

Coordinate Jiangsu, where the price of lobster is between 10-35 per catty, with different sizes. Every lobster restaurant here has different tastes, such as garlic, spicy, thirteen incense and so on. If it is cooked at home, first put the lobster in the oil pan, pick it up, put pepper, garlic, star anise and other spices in the oil pan, and then put it in a fire the size of beer and cook it alternately for about half an hour.