Villagers work in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
A villager demonstrates newly produced tea leaves in a tea workshop in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
Villagers work in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
Villagers examine newly produced tea leaves in a tea workshop in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
Villagers work in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
Aerial photo taken on July 24, 2017 shows a part of Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)
A villager works on newly-picked tea leaves in a tea workshop in Nangonghe Tea Plantation in Bazi village of Longgang township, Kaiyang county of southwest China's Guizhou Province, July 24, 2017. About 300 villagers in the neighborhood have benefited from the selenium-enriched tea produced in the plantation that began its operation ten years ago. (Xinhua/Yang Ying)