“ FIFTH REGION ” is an extreme fairy tale about Hong Kong future in 2060. During the project, I concerned about some recent issues that are Overpopulation, Land shortage, and New Town Planning in Hong Kong. In the past 80 years, Pedestrian systems created multilevel urbanisms that continue to expand, it leads to heavy air pollution. Hong Kong is in a blind alley. To tackle these problems, a new mega-structure is built, which is a mid-air network, it is created above 200 meters from the earth’s ground, which called ” FIFTH REGION ”.