Photo taken on April 2, 2014 shows the entrance of a collapsed railway tunnel in Hunchun, northeast China's Jilin Province. A tunnel of the Jilin-Hunchun High-Speed Railway, which is under construction, collapsed at around 2:00 am Wednesday, leaving 12 workers trapped. Rescuers have arrived at the collapse scene as the cause of the accident is being investigated. [Photo/Xinhua]