While most property and homeowners might be lucky to erect a small fence, add a new wall, or plant a few trees without applying for a permit or checking local zoning laws, things in Bejing are apparently quite different. For the last six years an eccentric doctor built a sprawling mountain villa on the roof above his top-floor flat in this 26-story residential building, all without asking permission of residents or local authorities. The enormous addition covers the entire 1000-square-metre roof and was built using artificial rocks but with real trees and grass. More