Hakka Tulou are traditional earthen buildings found in the Fujian province of China, primarily constructed by the Hakka people. These structures are known for their unique circular or square shapes and are designed to house multiple families. Built from rammed earth, they provide natural insulation and protection against invaders. Typically, a Tulou can accommodate up to 80 families, featuring communal living spaces and shared facilities. The architecture reflects the social and cultural values of the Hakka community, emphasizing family unity and collective security. Today, many Tulou are recognized as UNESCO World Heritage Sites, attracting tourists and researchers alike.