China opens world's longest sea bridge

China has opened the world's longest sea bridge, a 55 km structure linking Hong Kong, Zhuhai, and Macau. Supported by three cable-stayed bridges and 400,000 tons of steel, it can withstand winds up to 340 km/h. The bridge includes a 6.7 km submerged tunnel and connects 11 cities in the Greater Bay Area. Completed in nearly nine years, it cost around $20 billion.

What is the length of the sea bridge completed in China?

Which two locations does the bridge connect?

What is the maximum wind speed the bridge is designed to withstand?

How many cities are encompassed by the Greater Bay Area connected by the bridge?

How much did the construction of the bridge cost?