Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua

Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua

Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua

Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua

Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua

Actors perform Tango at Argentina Pavilion in the World Expo Park in Shanghai, east China, on May 5, 2010. The Argentina Pavilion is divided into indoor and outdoor parts with the former exhibiting pictures, traditional craft of the past 200 years in a multimedia way and the latter as an open green space for leisure. Photo: Xinhua