The document discusses the demolition and redevelopment of several historic buildings and communities in Hong Kong in the name of urban renewal. Several landmarks like Lee Tung Street, Star Ferry in Central, and the former Marine Police Headquarters were bulldozed to make way for high-end apartments, shopping malls, new roads, and highways. However, some sites like the former Wo Cheung Pawn Shop building, Tai Yuen Street Outdoor Market, and the married police quarters on Hollywood Road were saved and revitalized through participatory planning efforts. The document advocates for preserving historic communities and buildings that contain cultural value.