Directly above the gate hangs a plaque inscribed "Tunhuang Temple." The Hungs left no record of their genealogy, but research reveals that a clan of their ancestors migrated from Tunhuang in Kansu province on the mainland. The big hall at the front was used for sacrifices.
祖祠的正門上，高懸著一塊匾額，書寫著「敦煌堂」三個大字，這是因為考據洪姓源流，洪姓祖先有一系是從大陸的甘肅敦煌遷移來台的，洪家懸掛著這塊匾額，含有追念根源的意義。