The shape of the Hakka walled houses in Gannan are mostly triple and quadruple houses.

First of all due to historical reasons. Gannan region is one of the earliest places where Hakka people settled, as early as in the Tang and Song dynasties, Hakka people have begun to live and prosper here. In order to adapt to the living environment and social structure at that time, the Hakka people began to build roundhouses, forming the unique Hakka roundhouse culture now. At that time, due to the limitations of economic conditions and the lack of construction technology, the Hakka people could only choose simple and practical architectural structures, and the structure of the triplex and quadruplex just meets this requirement.

The second reason is cultural. The Hakka people have always emphasized family culture and family traditions, and the structure of the triplex and quadruplex has a strong family significance. The triplex represents three generations under the same roof, and the quadruplex represents four generations under the same roof. This structure not only meets the needs of family residence, but also reflects the spirit of the Hakka people who emphasize family tradition and family culture. Therefore, in Gannan area, the shape of Hakka houses are mostly triple and quadruple houses.

Hakka Art and Culture:

The Hakka Mountain Songs and Tea Picking Opera are the essence of Hakka culture (Gannan) performing arts. Gannan is the earliest place where Hakka songs were sung. Hakka songs arose in the area of Xingguo in Gannan, and the story of "Luo Yin Xiu Cai copying the songbook" in the late Tang Dynasty is still circulating in Xingguo. Gannan Hakka songs not only inherited the traditional poetry of fugue, than, Xing, but also in the long-term artistic practice of the people, and constantly enrich and develop, creating a variety of artistic techniques and forms of expression, with a strong local color and pungent aroma of the soil.

The Tea Picking Opera is a kind of opera native to Gannan. It is said to have originated from the tea song of Jiulong Mountain in Anyuan, and has a long history of production and circulation. Tea-picking opera performances are witty, humorous and interesting, and the content is close to the life of the working masses, with fewer characters and simpler sets and props. Compared with other opera programs, Gannan Tea-picking Opera is cheerful, lively and popular among the masses, and has become one of the most favorite forms of opera among the Hakka people. After the birth of the tea-picking opera in Gannan, it soon spread to the neighboring places such as Fujian, Guangdong, Hunan, etc., with far-reaching influence.

Refer to Baidu Encyclopedia - Hakka Culture in Gannan