Staff members walk past a logo of the World Economic Forum (WEF) in Davos, Switzerland, on Jan. 22, 2018. Davos, which is hosting world leaders for the Jan. 23-26 annual meeting of the World Economic Forum (WEF), was also affected by heavy snow as the area was secured for the gathering that will draw political, business and cultural leaders from all around the world. (Xinhua/Xu Jinquan)