The Kingdom Tower, with a design height of approximately 1,007 meters, will be completed in 2018, and the tower will become the tallest building in the world. In fact, the original design height of the Kingdom Tower was 1500 meters. What is the reason for descending nearly 500 meters? The main reason is the wind. Engineer William Lemaisault pointed out that when people on the ground felt the breeze blowing, the 500m height was actually a raging wind. In 1978, the 278.9-meter-high Citigroup Center building just erected in New York, which is from Lemai The hand of Sur. An architecture student asked him a question: Is the building so high that it is possible to be blown down by the wind? Lemaisur burst into a cold sweat and suddenly realized that he only considered the design. The vertical wind direction and the influence of the 45-degree wind direction were left behind! The staff had to work overtime in the middle of the night, welded the windproof support plate, and kept this secret for 20 years. What does this text mean? ['Building height is subject to wind.', "Le Maisur's carelessness.", 'The tallest building in the world will exceed one thousand meters.', 'The uniqueness of the Citigroup Center Building.']