A herd of Tibetan antelope roam in the Ruoergai Wetland National Nature Reserve in Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province, Oct. 24, 2020. The Ruoergai Wetland National Nature Reserve is established to protect local peat swamp ecosystem and rare species such as the black-necked crane.(Photo: Xinhua)