Hsia’s primary research focuses is on reconstructing the P-T-t history of metamorphic rocks through phase equilibrium modelling, which provides insights into the tectonic evolution of Southeast Asia. His work involves microstructural observations to identify different metamorphic stages, utilizing software to constrain the temperature and pressure conditions, and ultimately reconstructing the metamorphic histories. Additionally, Hsia also focuses the tectonic evolution of the Tethys domain since the Late Mesozoic (after 160 Ma), integrating findings from metamorphic studies with data from geochemistry, structural geology, and paleobiology to reconstruct the evolutionary history of the region. His current research areas include Sulawesi, Ambon, and Timor.