When was the first ring road in Chengdu built?

Chengdu Ring Expressway (G4202), also known as Chengdu Fourth Ring Road, was completed on June 6, 2006+0,65438+February 6, with an investment of 4.3 billion yuan, with a total length of 85 kilometers and six lanes in both directions. It is one of the important parts of Chengdu's "ring+radial" highway network, and it has interchanges with all expressways and main roads in Chengdu. Semi-free status (65438+ 1 from 00: 00 on February 0, 2007), when the vehicle with Sichuan A license plate that has paid the annual fee of "Five Roads and One Bridge" passes through Chengdu Ring Expressway, the "Five Roads and One Bridge Management Office" will pay the vehicle toll as a whole, and the owner is exempted from paying the full fee, but the system of picking up the card at the station and swiping the card at the station is still implemented. The remaining vehicles are normally charged).

People's Republic of China (PRC) Civil Code

Article 788 A construction project contract is a contract in which the contractor carries out the project construction and the developer pays the price.

Construction engineering contracts include engineering survey, design and construction contracts.

Article 789 A construction project contract shall be in written form.

Article 792 A major state construction project contract shall be concluded in accordance with the procedures prescribed by the state and the investment plan, feasibility study report and other documents approved by the state.