Why is JaeHyun called steamed stuffed bun?

JaeHyun's personal group is called the Bread Group. Bread Group, whose full name is "We Must Have Bread", was written by JaeHyun, an actor of Chinese Forum. JaeHyun, whose stage name is Jae Hyun, was born in Seoul, South Korea on February 4th, 1997. She is a Korean pop male singer and a member of the male singing groups NCT, NCTU and NCT 127.