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Aerial photo taken on Aug. 31, 2018 shows the mist-enveloped Great Wall in a mountainous area in north Zunhua City of Tangshan City, north China's Hebei Province. (Xinhua/Liu Mancang)
Aerial photo taken on Aug. 31, 2018 shows the mist-enveloped Great Wall in a mountainous area in north Zunhua City of Tangshan City, north China's Hebei Province. (Xinhua/Liu Mancang)