A view of escalators built along a mountain slope in Southwest China's Chongqing Municipality, Aug. 13, 2019. The project, comprised of 14 elevators moving in two directions, allows local residents to easily commute between two places at different heights. [Photo/VCG]

A view of escalators built along a mountain slope in Southwest China's Chongqing Municipality, Aug. 13, 2019. The project, comprised of 14 elevators moving in two directions, allows local residents to easily commute between two places at different heights. [Photo/VCG]

A view of escalators built along a mountain slope in Southwest China's Chongqing Municipality, Aug. 13, 2019. The project, comprised of 14 elevators moving in two directions, allows local residents to easily commute between two places at different heights. [Photo/VCG]

A view of escalators built along a mountain slope in Southwest China's Chongqing Municipality, Aug. 13, 2019. The project, comprised of 14 elevators moving in two directions, allows local residents to easily commute between two places at different heights. [Photo/VCG]