A farmer stacks harvested highland barley in Gangdui Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)

 

Farmers harvest highland barley in Gangdui Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)

A farmer harvests highland barley in Jiazhulin Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)

Farmers harvest highland barley in Jiazhulin Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)

A farmer harvests highland barley in Jiazhulin Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)

Farmers stack harvested highland barley in Gangdui Town of Gonggar County, southwest China's Tibet Autonomous Region, Aug. 5, 2012. Barley and wheat growers along the Yarlung Tsangpo River have started their annual crop harvest since the beginning of August. (Xinhua/Wen Tao)