2. Because if you cook crabs in cold water, the delicious taste and nutrition of crabs will be lost to a certain extent, and the meat quality will be older and the taste will be bad. After the water is boiled, crabs can be put in, which can keep the freshness and tenderness of crabs.

3. Time for boiling crabs: Boil cold water first, then add crabs and cook for 15-20 minutes until the crabs change color. Generally, the time to cook crabs is also related to the size of crabs and the number of crabs in the pot. Generally, if the quantity is large and the crab is large, cook it for a long time as appropriate.