(REUTERS) - The Shanghai Tower, set to be the world's second tallest building when it is completed this summer, has opened its doors to visitors.

The 120 floors of the 632m structure will make the building the tallest in China, but brings it just under 200m lower than the Burj Khalifa in Dubai.

That could be a blessing in disguise, according to chief architect, Marshall Strabala.

"I think one of the most profitable skyscrapers in the world is the Empire State Building. It's one of the most successfully rented buildings in the world, but for the first ten years it didn't make any money... the world's tallest building curse.

"This is not the world's tallest building so there's no recession. So that's the world's tallest building curse, it's not the skyscraper curse. So it's actually better to be No. 2 than No. 1," Strabala said.

The architect is confident that the building will be a commercial success and not stand empty once it is completed.

Many of those touring the building seemed wowed by the design.

The Shanghai Tower is set to house mainly financial institutions and government agencies, according to Gensler, the architecture firm behind the project.