Beijing Avenue Tunnel has been closed.

1. Incomplete construction process: Benjing Avenue Tunnel is a large-scale infrastructure construction project, and its construction process involves many aspects, including tunnel excavation, internal structure construction and installation of supporting facilities. If one link is not done well, it will directly affect the progress of the whole project. Therefore, the construction process is not completed, which will lead to the tunnel not being opened on time.

2. Unqualified quality inspection: In engineering construction, quality inspection is an important link to ensure engineering quality and safety.

3. Funds: The construction of Benjing Avenue Tunnel needs a lot of funds, including labor costs, materials costs, equipment rental fees, etc.