The world's longest sea bridge has opened. It links Hong Kong and mainland China. It is 55 kilometres long and took 10 years to build. Special islands in the river support the bridge. There is also a 6.7-kilometre tunnel for ships to sail over. The travel time between mainland China and Macau will be cut by two-and-a-half hours.

China's president was at the opening ceremony. The bridge will link 68 million people. Up to 29,000 cars will cross the bridge every day. A trade expert said the bridge will help China. Tourists can drive across the bridge, but local car owners need a permit. Most drivers will take a shuttle bus. This will cost $8-$10.