The ballast-less track construction of Anhai Bay bridge of cross-sea Fuzhou-Xiamen high-speed railway was completed on Aug 4. Complex conditions on the sea made it very challenging to maintain the stability of the track on a long cross-sea bridge. Constructors applied aerodynamic measures to reduce wind-induced vibration. To ensure the construction quality, various preparations were done beforehand. Rail laying will start soon as the ballast-less tracks of all three cross-sea bridges on the Fuzhou-Xiamen high-speed railway have been done. This is China's first cross-sea high-speed railway, and it has a length of 277.42 kilometers.