Passengers look on route information at the Matoutan Park Station of the Metro Line 6 (second phase) in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Passengers pose for photos on the first carriage of a train of the Metro Line 5 in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Aerial photo taken on Dec. 26, 2021 shows the Hubei University of Chinese Medicine Station of the Metro Line 5 in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Aerial photo taken on Dec. 26, 2021 shows a train pulling out of the Hubei University of Chinese Medicine Station of the Metro Line 5 in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Photo taken on Dec. 26, 2021 shows the Xujiapeng Station of the Metro Line 5 in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Photo taken on Dec. 26, 2021 shows the Xujiapeng Station of the Metro Line 5 in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Passengers look on route information at the Pengliuyang Station of the Metro Line 5 in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Passengers walk past an embossment at the Pengliuyang Station of the Metro Line 5 in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Passengers prepare to take the Metro Line 5 at the Hubei University of Chinese Medicine Station in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Passengers take photos on the first carriage of a train of the Metro Line 5 in Wuhan, central China's Hubei Province, Dec. 26, 2021. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Aerial photo taken on Dec. 26, 2021 shows the Guizihu Station of the Metro Line 16 in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)

Aerial photo taken on Dec. 26, 2021 shows the Metro Line 16 and Guizihu Bridge in Wuhan, central China's Hubei Province. Three urban rail lines in Wuhan opened to the public on Sunday - Line 5, the second phase of Line 6, and Line 16 (Hannan), boasting a total length of 75.2 km. Line 5 is Wuhan's first fully automated metro line. Line 16 is built along the Yangtze River, with the highest station standing at 30 meters, offering passengers a nice view. The total length of metro rails in operation in Wuhan has reached 435 km. (Photo by Wu Zhizun/Xinhua)