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Photo taken on April 1, 2018 shows the alsophila spinulosa, a rare tree species, in Medog County, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)
Photo taken on April 1, 2018 shows the alsophila spinulosa, a rare tree species, in Medog County, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)