The stretch of line between Hangzhou and Fuzhou, on which the trains were running, was completed in 2009 and is one of the eight high-speed rail corridors that form the backbone of China's network. However, the line carries both passengers and freight, which limits the top speed of the trains, and the two trains were not from the vaunted third generation of trains that have been unveiled in the past year and can hit speeds of up to 220mph on special lines.