Why is the maximum speed of the Green Giant only 160 km/h?

[LeonardoLee]

The emergence of the Green Giant is mainly to improve the operational efficiency of existing passenger trains on conventional lines, especially the throughput capacity of large passenger stations, and to enhance passenger comfort. It is currently the upgraded replacement for the 25T series, designed for the upgrade of conventional-speed lines rather than competing with the current Harmony series. It operates on conventional-speed railways, which are standard electrified railways, not high-speed lines. The stations it stops at are the same as those for regular express trains, not specially built. Achieving a speed of 160 km/h is already commendable. Additional information: Railways are not entirely straight; the degree of curvature is called the turning radius. The larger the radius, the higher the speed a train can maintain when turning, while a smaller radius increases the risk of derailment. Longer trains require more complex steering control during turns, making turning more challenging. Higher speeds also demand more stringent braking requirements. The trailer section of the Green Giant is based on the existing 25T series, with interior design optimized by referencing current high-speed EMUs and improving the passenger interface.