The fifth-tallest building in the world， the Lotte World Tower， has opened in Seoul， South Korea.英语短文阅读
The event was celebrated in a ceremony with a fireworks display that lit up the building and the sky.
The 123-story glass and steel structure is South Korea's tallest building. It rises 555 meters above the Seoul skyline.
The tower features the world's highest floor made of glass. From this observation area， traffic about one-half kilometer below.
The building also has the highest swimming pool in the world， as well as the world's fastest eleva one minute.
offices， personal residences and a seven- for public events and entertainment， with a shopping mall， aquarium， movie theater， park.
The launch came during a troubled time for the Lotte Group， which is known for its international chain of supermarkets. The group's chairman and some of his family members recently went on trial for fraud and other charges.
Lotte has also faced problems in China， where the government reportedly retaliated against it for providing land in South Korea for the U.S.-built THAAD anti-missile system.
Kohn Pedersen Fox . It cost about $3.6 billion to build.
"a modern aesthetic with forms inspired by the historic Korean arts of ceramics， porcelain and calligraphy."
to be South Korea's tallest building - Northeast Asia Trade Tower – which opened in the city of Incheon in 2014.
Below is a list of the top 10 tallest buildings in the world.
I'm Bryan Lynn.