PICS: World's Longest 55 Km Sea-Crossing Bridge, Which Took 9 Years To Complete, Opens Between Hong Kong- China

It is a key element of China’s plan for a Greater Bay Area covering 56,500 square km across southern China, and encompassing 11 cities, including Hong Kong and Macau, that are home to a combined 68 million people. / AFP Image

This marks the completion of the longest sea-crossing bridge ever built, nine years after construction began. The 55 km bridge was originally due to open in 2016, but repeated delays pushed that to this year. / AFP Image