Core Viewpoint - The CR450 high-speed train has achieved significant advancements in speed and efficiency, with a maximum speed of 450 km/h and a remarkable acceleration time from 0 to 350 km/h in just 4 minutes and 40 seconds, outperforming its predecessor, the CR400, by 100 seconds [1][3]. Group 1: Performance and Testing - The CR450 train has completed various type tests at different speed levels and operational scenarios, currently undergoing operational assessment on the Shanghai-Chongqing-Chengdu high-speed railway [1][6]. - The operational assessment requires the CR450 to run a total of 600,000 kilometers to evaluate the stability and reliability of the train and its systems [1]. Group 2: Technical Innovations - The CR450 features a more powerful permanent magnet traction system, improving efficiency by 4% compared to the CR400 [4]. - The design modifications, including a fully enclosed bogie area and a 200 mm reduction in train height, have led to a 22% reduction in overall train resistance [4]. Group 3: Safety and Future Testing - The CR450's bogie has been tested in the lab with a critical speed of 616 km/h, indicating a high level of safety for operations between 400 and 450 km/h [5]. - Future comprehensive testing will take place on the Chengdu-Chongqing line, closer to actual operational conditions [6].

Group 1 - The Chengyu Middle Line High-Speed Railway will operate at a speed of 400 km/h, reducing travel time between Chengdu and Chongqing to 50 minutes upon completion [1] - The railway is a key part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 292 kilometers and a design speed of 350 km/h [2][3] - The railway will connect with several existing and under-construction high-speed rail lines, enhancing the transportation network in the Chengdu-Chongqing area and supporting the development of the Chengdu-Chongqing economic circle [3] Group 2 - The CR450 high-speed train is expected to be the core technology supporting the 400 km/h speed target, with ongoing technological innovations and infrastructure verification [4] - The CR450 train has achieved international leadership in key performance indicators such as operational speed, energy consumption, noise levels, and braking distance, promising a better travel experience [4] - The CR450 train has completed various stages of development, including prototype testing and performance validation, in preparation for trial operations [4][5]