Tight security

The government also launched the biggest security operation in China since the 2008 Olympic Games in Beijing in preparation for the event.
As a result, not all Shanghai residents are celebrating the event, which brings additional traffic restrictions and security checks across the city.
"The traffic restrictions are not convenient for Shanghai residents but in the future, it will bring Shanghai many business opportunities," Xu Qing, a local resident, said.
An additional 8,000 police officers have been brought in to help Shanghai’s 46,000-strong police force to patrol the city, according to Xinhua, the official Chinese news agency.
An estimated 70 million people, mainly Chinese, are expected to tour the giant exhibition site, as Shanghai hopes to recreate the glamour of an event that was traditionally seen as one of the most prestigious international events before the rise of the Olympics.
Shanghai allocated $45 billion to upgrade the city's infrastructure, creating the world's longest metro system, two new airport terminals and a $700 million promenade on the historic Bund as well as new roads, parks and bridges.
"They have certain expectations of the international audience," Bo Zhiyue, a Chinese politics expert at the National University of Singapore's East Asian Institute, said.
"They are trying to boost their international image by trying to doing what they think will meet the expectations of foreigners."
The first world fair was held in London's Hyde Park in 1851, in the landmark Crystal Palace which was later destroyed in a fire.
The 1889 Paris Expo saw the creation of another famous landmark as French structural engineer Gustave Eiffel presented his Eiffel Tower as a tribute to
developments in science and engineering.
For China's 1.3 billion people, powering an economy likely to soon overtake Japan as the world's second-largest, the outcome of soccer jerseys the Expo will be cast as another display of the Communist leadership's power and prestige.