From what I've seen, Taiwan doesn't really have sidewalks. Instead, people walk "under" buildings.
Is there a name for that gap space, between the street and the building fronts?
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Apparently, the space is called a five foot way in SE Asia:
Although it looks like European arcade along the streets, it is a building feature that suits the local climate, and characterizes the town-scape and urban life of this region.
And the buildings that have this sort of space are called qilou.