Aerial photo shows the switchbacks on a road in the Yellow River Stone Forest scenic area in Jingtai County, Baiyin City, Northwest China’s Gansu Province, Jan. 14, 2018. The scenic area is known for cliffs and stone formations as well as the 22 bends on a 2.3-kilometer-long mountain road with a vertical drop of 150 meters. (Photo/VCG)
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