Tourists go sightseeing at Nanweng River National Nature Reserve, northeast China's Heilongjiang Province, June 17, 2015. As the largest nature reserve located at the highest latitude in China for forest-marsh wetland ecosystems in the cold-temperate zone, Nanweng River National Nature Reserve holds the most concentrated marsh wetlands in the forest of Dahinggan Mountains (Greater Hinggan Mountain). (Xinhua/Wang Kai)
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