Their signature yellow roe crab evolved from the traditional Teochew Cold Crab, by incorporating tastes and eating styles from different cultures. Only crabs that have double-shell (i.e., they have a soft shell within the hard shell, happens while they are renewing their shell) are used, as it's the time when the crab would be full of roe (pictured, as Gail has opened up the crab to reveal the roe within).