China Railway Group Limited (CREC) is a super-large conglomerate with more than 100 years history, one of the largest engineering contractors in the world, ranking the 39th among the Fortune Global 500 in 2023. CREC was successfully listed in Shanghai Stock Exchange and Hong Kong Stock Exchange respectively in 2007. CREC’s business scope covers engineering survey and design, construction and installation, industrial manufacturing, real estate development and other relevant businesses. CREC has successively built more than 2/3 of China’s national railway network, 90% of China’s electrified railways, 1/8 of the national expressways and 3/5 of the urban rail transit system; built various river and sea bridges with a total length of more than 13,000 kilometers; completed more than 10,000 kilometers of various types of tunnels. 12 expedition teams from CREC have been dispatched to implement construction and maintenance of Antarctic Zhongshan Station, Great Wall Station, and Kunlun Station in Antarctic. CREC has involved in design and construction of more than 5000 airports, ports, hydropower stations, high-rise buildings, municipal and other mega projects, covering all fields of civil engineering. CREC’s projects locate all over China and more than 90 countries and regions all over the world. CREC’s expertise in science and technology has reached advanced level in many areas in the world and won various highest national awards.