The Third Design and Research Institute of Mechanical Industry (CTDI) is located in Chongqing, under the jurisdiction of China National Machinery Industry Corporation (SINOMACH), a large state-owned enterprise group. It is a technology-based enterprise with strong comprehensive strength, comprehensive business scope, professional consulting and design, a gathering of expert talents, rich engineering experience, and fruitful performance. It is a national level large-scale Grade A design and research institute, and enjoys a high reputation in the survey, design, and consulting industry in China, It is one of the top 100 enterprises in survey and design, project management, and engineering general contracting in China.

CTDI has a complete set of professional configurations, with over 40 specialties including various processes, equipment, civil engineering, public utilities, and economics. Its business covers domestic and foreign engineering general contracting, industrial engineering, construction engineering, municipal and environmental protection engineering, engineering construction, engineering consulting, and construction drawing review. It can provide customers with project planning consulting, engineering design, equipment design and manufacturing, engineering construction, and engineering supervision The entire process of project management and general contracting services.