High-speed rail
High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of and existing lines in excess of are widely considered to be high-speed, with some extending the definition to include lower speeds in areas for which these speeds still represent significant improvements. The first such system began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains normally operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design.
High-speed rail
In 2008, high-speed trains began running at a top speed of on the Beijing–Tianjin Intercity Railway, which opened during the 2008 Summer Olympics in Beijing. 
The following year, trains on the newly opened Wuhan–Guangzhou High-Speed Railway set a world record for average speed over an entire trip, at over . In July 2011, however, top train speeds were lowered to . The 350 km/h service resumed on the Beijing–Shanghai High-Speed Railway on 21 September 2017.