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).
Higher-speed rail
In China, the higher-speed railways are the railways that are not officially categorized as high-speed rail but allow CRH EMUs run on it with speeds up to 200 km/h. Typically these lines are classified as Grade I conventional railways and are used by both passenger and freight services. These lines will have CRH services with identifiers starting with D or C. Such services typically continue into actual high speed railways. Many regional CRH "Intercity" services with identifiers starting with C, run strictly on higher speed railways. While trains that strictly run on high-speed rail lines will have identifiers starting with G.