英文摘要:The subject of this research is the ceremony of “Bai-sin-din” at two villages of Jai-don division of Pindon county in Taiwan. I analyse the process in construction of identity from neonates(or infants) in Hakka society through the performance of “Bai-sin-din” ceremony and exchange of “ new birth cakes”. The method of this thesis is in-depth interview to understand the performance of ceremony and participation-observation in to the field to control the exchange behaviors of new birth cake . This research divides into two parts: first, what does it imply from the ceremony arrangement, performance and be the mechanism of identity transformation in the Hans society? Second, how do we reconfirm the identity of neonates , observe the change of groups boundary and understand the relationship of the senders through the exchange activities of new birth cakes from families, communities and cross-communities ?