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

A tourist poses for photo in Murren, a famous mountain village near Jungfraujoch, Switzerland, Nov. 23, 2018 . 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)