Aerial photo taken on Aug. 29, 2020 shows farmers harvesting highland barley in Gyangze County of Xigaze, southwest China's Tibet Autonomous Region. Local farmers are now busy in the fields in the harvest season of highland barley. (Xinhua/Sun Fei)

Farmers harvest highland barley in Gyangze County of Xigaze, southwest China's Tibet Autonomous Region, Aug. 29, 2020. Local farmers are now busy in the fields in the harvest season of highland barley. (Xinhua/Sun Fei)

A farmer harvests highland barley in Gyangze County of Xigaze, southwest China's Tibet Autonomous Region, Aug. 29, 2020. Local farmers are now busy in the fields in the harvest season of highland barley. (Xinhua/Sun Fei)

Aerial photo taken on Aug. 29, 2020 shows farmers harvesting highland barley in Gyangze County of Xigaze, southwest China's Tibet Autonomous Region. Local farmers are now busy in the fields in the harvest season of highland barley. (Xinhua/Sun Fei)