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Photo taken on April 8, 2019 shows the stereo-traffic system in Chongqing, southwest China. Chongqing, a city located on hills, is known for its stereoscopic landscapes. (Xinhua/Wang Quanchao)
Photo taken on April 8, 2019 shows the stereo-traffic system in Chongqing, southwest China. Chongqing, a city located on hills, is known for its stereoscopic landscapes. (Xinhua/Wang Quanchao)