"#MountainsMatter" theme chosen to celebrate this year's Int'l Mountain Day

Photo taken on May 12, 2018 shows a meadow with narcissus radiiflorus on a mountain near Montreux, Canton of Vaud, Switzerland. Dec. 11 is the International Mountain Day, which was established by the UN General Assembly in 2003 to encourage sustainable development in mountains. "#MountainsMatter" is the theme chosen for this year's celebration of International Mountain Day. (Xinhua/Xu Jinquan)