Aerial photo taken on June 22, 2019 shows a scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. At more than 3,000 meters above sea level, the Sangke Grassland in northwest China is now a popular tourist destination besides being a major pasture for the local animal husbandry. (Xinhua/Ma Ning)