1. The gills in the middle of the shell, at the top, cannot be eaten.

2. The stomach (male crabs are pointed, triangular line; female crabs are large semi-circular) that piece can not be eaten

3. After the crab shell, the crab meat on the white, thin, long things can not eat (do not know what to call).

Crab is a cold food, people with a weak stomach are advised to eat less.

Precautions

Crab should not be eaten with sweet potatoes, pumpkin, honey, oranges, pears, pomegranates, tomatoes, melons, peanuts, snails, celery, persimmons, rabbit, thorns and mustard; eating crab should not be drunk with cold beverages will lead to diarrhea.