Now that's called engineering: video reveals how China builds its high-speed rail China has 12,500 miles of high-speed rail tracks, more than the rest of the world's combined together. In last decade, China has built the largest high-speed rail system. The video shows how the China Railway Corporation built rail tracks. The 580-ton mega machine is deployed to set girders into place, and speed up the whole construction process. The mega machine looks like a train, and can run on the bridge. It ca

5.9K views · 113 shares | Engineering marvel. A closer look at how world's longest sea bridge came into being. | China Xinhua Sci-Tech | Facebook