This was a special and unique scaffold for the Hong Kong Space Museum. This hemispheric scaffold was a structure of inclined, double-layered scaffold with work platforms. The double layers of the scaffold were fixed to each other. The scaffold was built spirally without the use of a single screw nor an iron nail. The work process was tedious but not difficult. It was built for a renovation project to prevent water leakage at the Hong Kong Space Museum in Tsim Sha Tsui.