Digital rebirth of Beijing's Old Summer Palace

Beijing’s Old Summer Palace was the most prestigious imperial garden in China until it was looted and burned down by British and French troops in 1860. Now the site is a major tourist draw, with unique lakes and landscapes as well as palace buildings preserved as ruins. Amid ongoing debate about whether the palace structures should be restored – or kept as a historical record – architecture professor Guo Daiheng has gone ahead with a digital recreation.