CHANGCHUN, Jan. 22 (Xinhua) -- An eight-car metro train, with the world's most advanced automated subway-line technology, for use in Chengdu rolled off the assembly line Tuesday in Changchun, northeast China's Jilin Province.

Two extra cars are added to the train, compared with conventional metro trains, to allow a larger passenger capacity during rush hours, experts with CRRC Changchun Railway Vehicles Company said.

With a maximum speed of 100 km per hour, the wide-body train can carry up to 3,456 passengers on a single trip.

Trains with the fourth grade automation system are capable of operating automatically, including with obstacle detection and remote control.