Mention Dubai, those who have been there and haven't will know one thing. Its synonymous word is luxury. There are asphalt highways leading to all four corners of the city, endless streams of Mercedes-Benz and BMW on the road, skyscrapers standing closely side by side, temples with different styles. The green trees, fresh flowers on both sides of the roads, and fragrant grass fields also accompany with the city. However, if it's not for those undeveloped sandy lands, if it's not for the sand under the flower and grass, you absolutely can't believe that this is a miraculous city built entirely in the desert.