Track-laying works begin on Changsha Metro Line 6 and Zhengzhou Rail Transit Line 10, China December 29, 2020 | Asia Pacific News Track-laying works have commenced on the Line 6 of Changsha Metro network and on the Line 10 of Zhengzhou Rail Transit network. The China Railway Electrification Bureau is executing the works... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password