Two new metro lines——the Line 10 and the Line 12——open services to passengers in Guangzhou, the capital of Guangdong province, on Sunday. The two lines feature GoA4, the Grade of Automation 4, the ...

Constructors work in the Yangtze River tunnel of the Wuhan Metro Line 12 in Wuhan, central China's Hubei Province, July 16, 2025. The 4,011-meter Yangtze River tunnel of the Wuhan Metro Line 12 ...