The time for steaming crabs depends on their size. The medium-sized Eriocheir sinensis should be steamed 10 ~ 15 minutes after boiling. This time range can ensure that the crab meat is thoroughly cooked, while retaining the moisture and umami flavor of its meat to the maximum extent. Steam the big crabs for 20 to 25 minutes. Eriocheir sinensis is a delicious seafood ingredient. Its scientific name is Eriocheir sinensis, commonly known as Chijia Red and Zhuozi. This crab belongs to Crustacea, Decapoda, Polypodiaceae. It is characterized by thick shell, fan-shaped head and breastplate, and raised surface. The color is mostly dark green, while the outer side of the claw foot is dark purple and the tip is dark black. Eriocheir sinensis is not only beautiful in appearance, but also delicious in meat.