CREEC is the largest multi-industry and comprehensive engineering survey & design corporation in China, with survey, design, consulting, general contracting and system integration as the core businesses. CREEC is the core enterprise of China Railway Group Ltd. With more than 6300 staff, CREEC sets up 41 disciplines including route, track, geology, subgrade, bridge, hydrology, tunnel & underground engineering, station & yard, communication, signal, informatization, locomotive & rolling stock, machinery, structure, architecture, water supply and drainage, HVAC, environmental protection, electric power, electrification, engineering cost, mining & ore dressing, airport electronics and aerial survey.