Chongqing Urban Transport Development Investment (Group) Co., Ltd. (referred to as “Chongqing Transportation Development Investment Group”) was established by the Chongqing Municipal Party Committee and Municipal Government in April 2009 by integrating the original development investment company, public transportation group, and transportation hub group (formerly Station Group). It is a large state-owned enterprise integrated with public welfare, service and investment. It is mainly responsible for the investment, construction, development and management of the city's light rail, subway, railway, airport, bus, station and other infrastructure. The initiative to integrate all transportation modes in the city has been highly recognized by the Ministry of Transport. At present, Chongqing Transportation Development Investment Group has four municipal state-owned backbone subsidiaries, including bus companies, rail groups, transportation hub groups, and railway groups, and quasi-financial companies such as Tongka companies, leasing companies, guarantee companies, and fund management companies. Soma Corporation with intelligent support, vocational colleges providing talent support, and more than 80 holding and equity holding companies such as aviation, with total assets of more than 130 billion yuan and more than 50,000 employees; more than 10,000 vehicles for public transport such as public transportation and rental By the end of 2014, the cumulative mileage of rail transit has exceeded 200 kilometers, ranking first in the central and western regions and fourth in the country. The vision will form a "seventeen lines and one ring" rail network with a total of 820 kilometers in eighteen lines. Providing travel services for more than 7.1 million citizens, has become the main force in Chongqing's urban public transportation construction and operation management.