At 200 meters long, the Sky Bridge will be the world's longest air-side bridge. At 28 meters high, it will allow the largest passenger aircraft - the A380 - to pass underneath.

An observation deck and restaurants were set up at both ends of the bridge. The floor is partly made of glass, allowing people to see planes passing through underneath the bridge.

The brand-new bridge is also expected to offer passengers tarmac views - including the third runway at the airport.

Ricky Leung Wing-kee, executive director of engineering and technology for the Airport Authority, said it usually takes passengers 20 minutes to take shuttle buses to their planes.

He said the new bridge will put an end to incidents where "an airplane passes the taxiway and the shuttle bus needs to let it go first, leaving passengers waiting anxiously.”

Meanwhile, with the delayed opening of the Sky Bridge due to Covid, Leung said he could not confirm the figure of the final bill as the Airport Authority and contractors are still in talks on who should foot the bill.

However, he expected little difference from the original HK$900 million price tag.