If the hairy crabs are alive before steaming, except for a few crabs with problems, it is usually caused by the heat of the hairy crabs not being controlled well during the steaming process and the steaming time is not long enough. Steam them again for 3- Try it for 5 minutes, then open it and take a look. If it is still black, it is recommended not to eat the black part. Everyone is steaming hairy crabs for as long as possible, steaming for more than 20 minutes~