Chinese firm upgrades Mexican subway

CRRC Zhuzhou Locomotive Co said the first section of Metro Line 1 of Mexico City in Mexico, which it has overhauled and upgraded, resumed operations on Sunday.

Metro Line 1, one of the oldest and busiest lines of Mexico City, has been in operation since 1969. The line spans 18.83 kilometers and has 20 stations, with daily passenger volume exceeding 1 million.

The subway overhaul is CRRC's first overseas "system plus" project. It involved investment, financing, manufacture of new trains, comprehensive modernization, and upgrade of existing car communication and signaling systems, electromechanical systems and the maintenance system.