Twin buildings under construction with red cranes with concrete retainers and showing city with air pollution haze, Locked establishing shot

building construction building construction chongqing buildings china structure twin towers twin buildings chinese municipality retainer downtown high rise air pollution cranes steel beams skyline asia tower skyscraper architecture urban sprawl construction crane red cranes city chongqing building metropolis modern green cityscape asian chungking view travel office exterior sky urban overcast pylons concrete apartments office space construction site wires mesh windows