Work on the main structure of China’s tallest building, the Shanghai Tower, has been completed.A flag-waving ceremony took place as the last steel beam was hoisted and installed at the top of the skyscraper.Once completed, the structure will reach over 630m, making it the second-tallest building in the world after the Burj Khalifa in Dubai.It is the last in a group of newly-built towers in Shanghai’s financial district amid China’s economic boom.It will become part of the city’s Lujiazui Finance and Trade Zone, which includes the Shanghai World Financial Center and Jin Mao Tower, both among the tallest in the world.

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