In summer, in Zhangjiachuan Hui Autonomous County, Tianshui City, Gansu Province, the mountains are covered with green carpet, cattle and horses are scattered, and the natural landscapes such as forests, grasslands and streams in the mountains constitute a beautiful picture. (this is the alpine meadow and forest on Guanshan Mountain taken on June 7.) (this is the beautiful scenery of Guanshan Forest Farm taken on June 7.) (on June 7, several cows rested in Guanshan forest farm.) (on June 7, two horses rested in Guanshan forest farm.) (on June 7, several cows were grazing in Guanshan forest farm.) (this is the beautiful scenery of Guanshan Forest Farm taken on June 7.) (Xinhua News Agency)