Constructors pose for a group photo in front of the portals at one end of a shield tunnel along the east sixth ring road in Beijing, April 20, 2025. [Photo/China Railway 14th Bureau Group Co., ...

This photo taken on April 20, 2025 shows a shield tunnel along the east sixth ring road in Beijing. [Photo/China Railway 14th Bureau Group Co., Ltd./Handout via Xinhua] ...

A vehicle runs inside a shield tunnel along the east sixth ring road in Beijing, capital of China, April 20, 2025. A renovation project on Beijing's east sixth ring road was opened to traffic upon ...