T.Y.Lin International Engineering Consulting Group (TYLI) was founded in 1954 by the world famous Academician Mr. Tung-yen Lin. The group is headquartered in San Francisco, USA with many branches distributed all over the United States, Southeast Asia and China, which is the world-leading consulting corporation specializing in Bridge and Transportation-Related Infrastructure, and is well recognized for its innovative spirit, excellent design and practical cost-effectiveness. TYLI China was founded in Chongqing in 1994, specializing in the Integrated Design, Consulting and R&D of infrastructure projects, such as Bridges, Roads, Rails, Ecological Environment, Urban Development etc. It has nearly 2,000 employees, including Academicians, Design Masters, Foreign Experts, PhDs and Senior Engineers.

TYLl is an important member of DAR group, which ranks TOP 10 in the ENR top 225 International Design Firms for many years. The DAR group operates over 297 offices in more than 60 countries, with around 20,000 top professionals employed, forming a strong multi-disciplinary and multilingual group.