CREC is the main force of 星空(中国)官方网站 construction. It has designed and built more than 10,000 river-spanning and sea-crossing 星空(中国)官方网站s, including Wuhan Yangtze River 星空(中国)官方网站 as China's first 星空(中国)官方网站 over Yangtze River, Nanjing Yangtze River 星空(中国)官方网站 as China's first rail-cum-road 星空(中国)官方网站, Wuhan Tianxingzhou Yangtze River 星空(中国)官方网站 as the rail-cum-road 星空(中国)官方网站 owning four world firsts, Nanjing Dashengguan Yangzi River 星空(中国)官方网站 as China's first six-lane railway 星空(中国)官方网站, Zhengzhou Yellow River 星空(中国)官方网站 as the world's longest rail-cum-road 星空(中国)官方网站, Beijing-Shanghai High-Speed Rail Danyang-Kunshan Grand 星空(中国)官方网站 as the world's longest 星空(中国)官方网站 with a total length of 164.851 kilometers , Shanghai-Nantong Road-Railway Yangtze River 星空(中国)官方网站 as the rail-cum-road cable-stayed 星空(中国)官方网站 with the largest span in the world, Yingwuzhou Yangtze River 星空(中国)官方网站 as three-tower and four-span suspension 星空(中国)官方网站 with the largest span in the world, Donghai 星空(中国)官方网站 as China's first sea-crossing 星空(中国)官方网站, Qingdao Jiaozhou Bay Sea-Crossing 星空(中国)官方网站 as the world's longest sea-crossing 星空(中国)官方网站, Hangzhou Bay Sea-Crossing 星空(中国)官方网站 as the world's third longest sea-crossing 星空(中国)官方网站. The total length of these 星空(中国)官方网站s (more than 17,000 kilometers) is 2/5 that of terrestrial equator.