China's CR450 EMU (Photo: Wikimedia Commons)

The CR450 has been subjected to continuous, rigorous testing since the prototype rolled out late last year.

After successfully meeting all performance metrics, including reaching a top speed of 450 km per hour, the train is now undergoing operational evaluation on the Shanghai–Chongqing–Chengdu high-speed rail line.

It must accumulate 600,000 kilometers of successful operation before the train is cleared for commercial passenger service.