At the same time, the four companies actively explored the expressway market, and successively built major sections such as Qin Fang Expressway in Guangxi, North-South Expressway in Guangxi, Nanning Airport Expressway in Guangxi, Nanyou Expressway in Guangxi, Nanbai Expressway in Guangxi, Guangzhou New Airport Expressway, Henan Sanling Expressway, Hehang Expressway, Hexu Expressway, Hunan Tanshao Expressway, Jingfu Expressway, Lu Tong Expressway, Zhejiang Zhu Yong Expressway and Guangxi Longbai Expressway.
In 2007, four companies participated in the construction of Harbin-Dalian Railway Passenger Dedicated Line and officially entered the field of railway construction. Since then, they have participated in railway projects such as Su-Huai Railway and Qingrong Railway.
Based on the enterprise spirit of "striving for leading technology and creating first-class management", the four companies are committed to market research, constantly developing new technologies and new processes, owning a number of domestic advanced and distinctive construction technologies and creating a number of famous projects. Wuhu yuxikou Coal Terminal was built in the early 1950s, which is the first modern coal terminal on the Yangtze River in China. In the 50,000-ton wharf project of Guangzhou Huangpu Xinsha Phase I completed by 1990, the new wharf technology of lattice steel sheet pile structure was successfully applied, and the construction methods of large-scale steel sheet pile lattice integral hoisting, large-scale sand backfilling of foundation trench and deep-water vibro-compaction technology were pioneered, which filled the gaps in China. In recent years, with the expansion to the field of road and bridge, there has been a new breakthrough in road and bridge construction technology. Through introduction and innovation, we have accumulated a number of mature and advanced road and bridge construction technologies and experiences. For example, large-diameter bored piles, large open caisson foundations, super-large caps, tall main towers, large caissons, cantilever assembly and pouring of box girders, paving with concrete pavers, etc. Yantian Port Phase II Road Yard Project won the Quality Engineering Award of the Ministry of Communications and the highest national architectural award-"Luban Award"; Jiangyin Yangtze River Bridge Project won the Jiangsu Yangtze River Cup Quality Engineering Award, the 3rd China Construction Engineering Luban Award, the Zhan Tianyou Civil Engineering Award and the Eugene Figo Gold Award of the International Bridge Association. Guangxi Nanning Airport Expressway won the "Golden Cup Award" for municipal engineering and the National Silver Award for Quality Engineering; Jiangsu Runyang Yangtze River Highway Bridge won the 6th Zhan Tianyou Civil Engineering Award; The construction of No.3 Nanjing Yangtze River Bridge 1 steel tower won the second prize of National Science and Technology Progress Award, the 7th Zhan Tianyou Civil Engineering Award and the gustavus-Lin Deen International Bridge Award. In recent years, it has won 8 national-level high-quality projects, more than 20 ministerial-level high-quality projects and high-quality concrete awards, and completed more than 20 technical innovation and scientific and technological key projects.
The four companies have accumulated rich construction experience in long-term construction practice and won a good reputation. Fourth, the company takes service and return to society as its own responsibility, is enthusiastic about public welfare undertakings, and shows its social responsibility. In 2004, it was rated as "National Excellent Enterprise of Engineering Construction Quality Management" by China Construction Industry Association; In 2007, the branch won the "National May 1 Labor Award"; In 2008, the branch trade union won the "National Home of Model Workers". Over the years, it has maintained the honorary titles of "two advanced units in civilized construction of national transportation system", "civilized units in Anhui Province", "advanced construction enterprises in Anhui Province" and "provincial enterprises that honor contracts and keep promises".
Four companies are constantly committed to management innovation, successfully passed the ISO 9002: 1994 standard quality system certification in 1999, and passed the certification of integrated management system of quality, environment and occupational safety and health in 2003. Since 2008, the four companies have successfully built management systems that meet their own requirements, and will continue to improve and perfect in practice.
During the "Twelfth Five-Year Plan" period, the four companies will enter a higher level of development under the guidance of the "new four modernizations" development strategy of informationization, specialization, internationalization and intensification of the Second Aviation Administration.