People walk out of a train during a test run of the Orange Line Metro Train in Lahore, Pakistan, on Dec. 10, 2019. Pakistan's first-ever mass rapid urban transit train took its first test run here on Tuesday after the completion of the physical infrastructure of the project under the China-Pakistan Economic Corridor (CPEC). (Photos:Xinhua)

Trains of the metro train service are seen at a terminal station in Lahore, Pakistan, on Dec. 10, 2019. Pakistan's first-ever mass rapid urban transit train took its first test run here on Tuesday after the completion of the physical infrastructure of the project under the China-Pakistan Economic Corridor (CPEC).