A brilliant film by the Danish director Martin de Thurah that featured at the Danish pavillion at the Shanghai world exposition in 2010. Fantastic cinematography by de Thurah and Kasper Tuxen. They've also teamed up on other projects, including the quite legendary video for Royksopp. The above film is one of a series. It is entitled EXPO Bicycle City.
Here are three of the others.Water City, Mermaid (about sending the Little Mermaid to China) and Family City.
Thanks to Eneko for the link.