After 32 months of challenging construction, Gansu celebrated a major milestone in its first fully self-funded railway project – the Tianshui-Longnan Railway. The Xujiaping Tunnel, the line's first ultra-long tunnel, completed tunneling on Friday. Stretching over 16 kilometers in length and reaching depths of up to 600 meters, the tunnel is a key project for the entire 215-kilometer route. (Photo by Shi Jiamin)