Every city has its own landmark brand and pride, The "Shuangling" created in Loudi, central HunanProvince, is such a brand, inheriting the culture and characteristics of the city, highlighting the growth andpride of the city, witnessing the changes of history, containing the essence of heaven and earth, entering thehome of one people after another, and stiffening the backbone of one nation after another. For exampleWuhan-Guangzhou high-speed railway,Shanghai-Kunming high-speed railway, Xiangxi Aizhai BridgeYangtze Gezhouba water Conservancy Project ( LY Steel products are applied to the main structure of thedam) , Yangtze Three Gorges water Conservancy project, Guangzhou Metro project , Guangzhou East RailwayStation Square, Shenzhen international Trade Building, Yellow River Xiao langdi water conservancy project.Capital international Airport , etc.