Hakka earth building, also known as Hakka earth enclosed building and round enclosed house, is a rare flower in the world's residential buildings. It is mainly distributed in Longyan City, Fujian Province, Zhangzhou, Raoping County, Guangdong Province and dapu county. Yongding Hakka Tulou is located in Yongding County, Longyan City, Fujian Province.

The most magnificent, the most generation.

Superficially, it is the Zhencheng Building in Hongkeng Village. Tulou was square at first, with palace style, mansion style and different postures. It is not only strange, but also full of mystery, solid and firm. Grain is piled up in the building and livestock are raised. If there is a well, if you need to guard against the enemy, you only need to close the gate, and several young and middle-aged people guard the gate. The earth building is like a strong fortress, and women, children, old and young can rest easy. Because the square earth building has directionality, dark corners and different ventilation and lighting, Hakka people have designed a round earth building with good ventilation and lighting, which has neither a beginning nor an end.