As Shanghai modernizes and seeks acceptance as an international city, originally plural and livable Lilong neighborhoods are now purposefully demolished and replaced by the unitary and unfriendly office building. While, in this process, some developers fence their land after acquisition for years, waiting for the increase of land value before the construction starting deadline. Pop-up museum is a proposal that upgrades the original unfunctional fence by transient building systems like scaffolding and crepe to trace back the right to land hoard- ing, demolition, and construction for the citizens. The most fundamental quality of this museum is its temporality: This monument will appear when the land hoarding starts and will disappear at the end of construction.