The world's fastest bullet #train, the CR450, has begun a battery of pre-service trials on a high-speed line in #China, clocking a single-train speed of 453 kilometers per hour. #ChinaTech The CR450 series, engineered for a top test speed of 450 km/h and a commercial service speed of 400 km/h, is now undergoing qualification trials on the high-speed rail linking the eastern city of #Shanghai and a western inland one of #Chengdu. | Xi's Moments