Heads of state call for addressing major global challenges at WEP in Davos

Klaus Schwab, founder and chief executive of the World Economic Forum (WEF), delivers a speech during the opening ceremony of the WEP annual meeting at Congress Center in Davos, Switzerland, Jan. 23, 2018. Heads of state called for 2018 to be the year of collaboration and multilateralism to address major global challenges like climate change, terrorism and protectionism, as the World Economic Forum (WEP) opened in Davos, Switzerland, on Tuesday. (Xinhua/Xu Jinquan)