Punktförmige Zugbeeinflussung
After acknowledging the warning signal the train has to stay below the braking curve (German "Bremskurve") - fast trains may travel up to 165 km/h and they must reduce the speed to below 85 km/h after 23 seconds. Note that the operation of high speed trains beyond 165 km/h is not based on visual wayside signals or PZB inductors (using LZB or European Train Control System cab-signalling instead in Germany).
High-speed rail
A collision of high-speed trains on 23 July 2011 in Zhejiang province killed 40 and injured 195, raising concerns about operational safety. A credit crunch later that year slowed the construction of new lines. But by 2012, the high-speed rail boom had renewed with new lines and new rolling stock by domestic producers that had indigenized foreign technology. On 26 December 2012, China opened the Beijing–Guangzhou–Shenzhen–Hong Kong High-Speed Railway, the world's longest high-speed rail line, which runs from Beijing West Railway Station to Shenzhen North Railway Station. 
The network set a target to create the 4+4 National High Speed Rail Grid by 2015, and continues to rapidly expand with the July 2016 announcement of the 8+8 National High Speed Rail Grid.