The demolition of a large illegal rooftop villa in Renji Shanzhuang, a residential compound in Haidian district, has been completed, leaving behind only a big pile of garbage. The structure, set on top of a 26-story building, was highlighted last year by media as "the greatest illegal building" as it was dotted with artificial rocks, grass and trees and a swimming pool. It covered more than 1,000 square meters.