The general size of the crab, the water boiled, keep the water boiling state, and then twenty minutes. It will be able to kill all the parasites inside. However, when it comes to individual crabs that are particularly large, you will need to increase the time at your discretion (the temperature in the center rises more slowly).
Practice and steps:
1, hairy crabs into the water soaked for 2 hours, wait for the crabs to remove their own dirt, and then use a toothbrush to brush clean for use.
2, add about 3 tablespoons of Dahongzhe vinegar in the pot, and add chopped ginger and a tablespoon of water to boil, and then add a little sugar to a small fire slightly hot to make the sauce (crabs belong to the cold soy sauce and vinegar can be neutralized and the coldness of it).
3, put a little water in the pot, add 2 slices of ginger (if there are perilla leaves to add perilla leaves) and a little yellow wine, boil into the crab, steam on high heat for 15 minutes. (Steam the crab when the crab will be reversed, so that the yellow of the female crab will not flow out!)