When Will Sawyer and Zhao first meet, Sawyer greets him with some Mandarin, and Zhao replies in the same language but there are no subtitles on the screen. He is asking in jest, "Your Mandarin is quite good; how is your English?".
During development, architect Adrian Smith was brought in to consult during the writing process. Smith led the work of Dubai's Burj Khalifa, which at the time of this movie's release is the tallest building in the world, and Saudi Arabia's Jeddah Tower, the building proposed to surpass the record held by the former.
At the start, shots of The Pearl, with the Victoria Harbour in the backdrop, can be seen with the Bank of China Tower, Central Plaza, Two International Finance Centre and International Commerce Centre, the tallest four skyscrapers in Hong Kong; each one surpassing over the other respectively since 1990.
The specifications listed in the news coverage scenes of the movie show "The Pearl" is 3,500 feet high and has 255 levels. A scene about 20 minutes into the movie takes place in a sub-basement Level 15.
The trivia item below may give away important plot points.
Closely related to The Towering Inferno - Movies are both about the tallest building in the world. Both buildings have a business lower half and a residential upper half. Upper half of each building is destroyed by fire. Helicopters explode on or near the roof.