A photograph of a circular earthen house rarely tells you which valley it belongs to. That is why Yongding and Nanjing can seem interchangeable before you arrive. On the ground, the useful unit is smaller: a named village, a cluster of buildings, sometimes a single house. Yongding is a district of Longyan; Nanjing is a county of Zhangzhou. Their shared building tradition crosses that administrative boundary.
The UNESCO property called Fujian Tulou brings together selected buildings in both areas and in Hua’an. Its name is an umbrella for a serial heritage site, not the name of one village. A journey can therefore move between different local settings while remaining within the same architectural story. The first choice is what you want to understand: the arrangement of a house, the relationship between several houses, or the village and cultivated ground around them.

