Provided are a carrier for displaying a target polypeptide and a use thereof. Particularly, core antigens of three types of hepatitis B virus from bats are modified to be used as a protein carrier for displaying a human T cell epitope. Also disclosed are a nucleic acid molecule encoding the carrier and a recombinant protein expressed thereby. The nucleic acid molecule or recombinant protein can be used in preparing a vaccine for preventing, alleviating, or treating an HBV infection.