Most of the earth buildings have a history of 200-300 years or even 500-600 years, and have survived numerous earthquakes, wind and rain storms as well as artillery attacks.

Tulou, as an architectural form that the Hakka people of Fujian are proud of, is the treasure of Fujian's residential buildings. At the same time, it is also a humanistic factor, which is the epitome of the tripartite combination of "heaven, earth and man". Dozens of families and hundreds of people live together in one building, reflecting the Hakka people's family tradition of living together and living in harmony. Therefore, a history of Tulou is a history of rural families. The descendants of Tulou can often tell the family history without genealogy. In addition, the use of local materials and the most common soil materials to build tall buildings, turning the ordinary into a miraculous, but also reflects the Hakka people in the process of conquering the nature of the ingenuity of the creation.

In the construction of earth building, round building and square building are usually built separately, but in some places due to historical reasons also formed a round building and square building combination of earth building group. Nanjing County book Yang Township Tianluokeng Huang's family, the foundation for hundreds of years has built 5 one linked round, square earth building combination. From the air, a square building is located in the center, and four round buildings surround the corners. It is like a large blossoming plum blossom, dotted in the green field above the plains, staggered, beautiful. The building group was first built for a square building, Huang's ancestors took the building named "and Chang building", after the people gradually prosperous, respectively, in the square building around the four round earth building, from the east, west, south and north of the four directions of the arch guarding the "and Chang building", so that it is like a mountain fortress, such as castles. The grand conception that captures one's heart, makes one look down and sigh! In addition, in Yongding Guzhu Township, Gao Bei Village, there is also a round building-based, square, round building mishmash of earth building clusters. This clever conception, strange combination, so that the architectural experts at home and abroad are full of praise

This century, after the 1960s, the traditional earth building has been basically rested, and now there are hundreds of preserved in western Fujian and southern Fujian different forms of earth building, which Yongding County and Nanjing County has the largest number of more than 100 large and small earth building. In Yongding, the earth buildings cluster in a few townships such as Hukeng and Guzhu, and there are 54 earth buildings in Hukeng Township alone; in Nanjing, there are more earth buildings in Shuyang and Meilin Townships. The vast majority of earth buildings are well-preserved and still inhabited. With the general residential mishmash **** existence, so that Pangrang Tulou is like a flock of cranes, especially eye-catching. Yongding County, Guzhu Township, Gao Bei Village, "Chengqi building" frequent appearances in movies and television, but also included in the "Dictionary of China's Famous Places", as China's "residential" stamps, one of the stamps. It is a unique specimen of round building modeling, so that the "Yongding Tulou" reputation has spread, and has become synonymous with Fujian Hakka Tulou.