The FGM500B dual-powered rail milling train is a new-generation intelligent, clean, and efficient railmaintenance equipment jointly developed by TsingInst Railway and the National Engineering Laboratoryfor Urban Rail Transit System Safety and Operation & Maintenance. Based on the actual needs ofGuangzhou Metro and in line with domestic metro universal standards, the product integrates TsingInstRailway's core technologies and advanced engineering concepts, aiming to provide a comprehensivesolution for rail smoothness and profile management that is highly efficient, precise, and low-carbon.