In September the Chicago-based Council on Tall Buildings and Urban Habitat (CTBUH) gathered high-minded designers, developers and engineers for a conference in Shanghai. CTBUH, which often partners with AN on conferences, including our own Facades+ events, invited me to serve as a special media correspondent for the conference, held September 16–19. I spent most of the time conducting video interviews with the symposium guests, which we'll post here on the AN blog as they become available. For now, here' a quick overview of the topics discussed. The theme of this year's conference was “Future Cities: Towards Sustainable Vertical Urbanism.” It was an especially relevant topic given the venue—held in the elegant, SOM-designed Jin Mao Tower, the conference looked for lessons (and warnings) in the kind of supertall, super-dense development that turned the Lujiazui area of Shanghai's Pudong district from farmland into a world financial center in just 20 years. Symposium presenters tackled sustainability from several angles. Matthew Clifford, head of energy and sustainability services for North Asia at JLL, stressed building operation and management is as important as design when it comes to energy use and building performance. Cathy Yang, manager of Taipei 101, recounted how “greening” the 101-story building did not turn a profit until the initiative's sixth year, but then made up for it in just three years. The Taiwanese supertall remains the largest LEED Platinum–certified building in the world. Jianping Gu of Shanghai Tower Construction and Development espoused the benefits of the “stereoscopic” form of his building, which at 2,073 feet is set to become the tallest building in China upon completion next year. “If you compare Shanghai Tower to Taipei 101, Petronas Towers, those were all isolated," Gu said. "There were already two towers in the vicinity when we started. We had to pay particular attention to harmonizing with those buildings. We consider this an issue of sustainability.” But towering, monumental architecture may not be for everyone. David Gianotten, an OMA partner heading the firm's Hong Kong office, told me OMA gets so many briefs seeking “iconic” design that the word has begun to lose its meaning. “If everything's special, then nothing's special,” he said. That debate continued onto the conference floor, where developers discussed how China's third- and fourth-tier cities should embrace the tall building boom—or whether they should at all. On the conference's final day, Mun Summ Wong of Singapore-based WOHA talked about the psychological environment of horizontal cities, and how tall buildings should better embrace the human scale. “The idea is to inject more urban life into the high-rise city,” Wong said. “We introduce horizontal movement in the high-rise building because it changes the dynamic. When you talk to the people next to you in an ordinary high-rise, it is considered rude. But in the street, you talk to people, build relationships and bonds.” Similarly, Yang Wu of the Bund Finance Center warned of the risks of homogeneous skylines. “When I open my eyes in the morning and I am in Shenzhen, I still think I am in Shanghai because they look the same,” he said. “[China is] duplicating buildings and the mistakes of the West. There is focus on building bizarre and tall buildings but ignorance of the connotations–resulting in cold buildings for cold cities. As a developer, I call on architects: you need to have your own independent ideas that bring vitality.” You can read more about the conference on CTBUH's website. Check back here as we post video interviews.