Residents walk through Chongguang Station on Line 5 of Chongqing’s rail network on Feb. 19. The new section opened on Monday, taking the total length of the city’s railways beyond 500 kilometers (310.7 miles). Photo: VCG

A train runs on the Line 2 monorail track on Feb. 18 in the southwestern metropolis. The line began operating in 2004 and was the first monorail in China. Photo: VCG

A Line 2 train runs through the Fotuguan section of Yuzhong district in central Chongqing in July 2021. Photo: VCG

Trains pass along a curved section of Line 2 in June 2014. Photo: VCG

A Line 2 train passes blooming plum blossoms in Fotuguan in February 2022. Photo: VCG

A train enters Liziba Station, situated inside a residential building, in October 2021. Photo: VCG

A train passes through the Jiulong Tower in June 2018. The tower, considered one of the ugliest buildings in Chongqing, was demolished that year. Photo: VCG

A Line 2 train runs past a viaduct in Chongqing’s Jiulongpo district in May 2020. Photo: VCG

A train runs past Yuanjiagang Station on Line 2 in April 2022. Photo: VCG

A train on Line 3 runs under the Caiyuan Ba Bridge on the Yangtze River in June 2021. The line links districts along the Yangtze and Jialing rivers. Photo: VCG

Chongqing opened Line 9 in January last year. The route runs more than 30 kilometers, connecting several commercial zones between Huashiguo and Gaotanyan from northeast to southwest. Photo: VCG

Liujiaping Station on Line 6, built over a river, opened in 2014. Photo: VCG

A train on Line 6 runs through the Qiansimen Bridge in Chongqing’s Jiangbei district. The line, which opened in 2012, connects Nan’an, Yuzhong and Jiangbei districts in central Chongqing. Photo: VCG

A line 6 train crosses the fog-covered Caijia Rail Transit Bridge in March 2022. Six more rail transit lines will be built in Chongqing this year, according to the Chongqing Transport Bureau and Chongqing City Transportation Development & Investment Group. Photo: VCG