Recently, several tender announcements have been released for the speed-enhancement renovation project of the Hangzhou-Changsha segment of the Shanghai-Kunming High-speed Railway. The renovation phase has now fully commenced across the jurisdictions of the Shanghai Railway Bureau, Nanchang Railway Bureau, and Guangzhou Railway Bureau. The primary objective of this renovation project is to elevate the operational speed of trains to 350 kilometers per hour, ensuring compliance with stringent safety standards.