Rangers patrol at the Qilian Mountains National Park in northwest China's Qinghai Province, April 22, 2021. There are currently 1688 rangers working at management and protection centers or stations of the Qilian Mountains National Park. The rangers, trekking through forests and mountains every day in patrols, shoulder the responsibility of keeping the park's forests safe as well as monitoring its flora and fauna resources. (Xinhua/Zhang Hongxiang)
