A speech by the U.N. chief, economic growth potential in places like China and Russia, the challenges of artificial intelligence, and appearances by leaders from Spain to Malaysia are set to headline the agenda at the World Economic Forum's annual event in Davos on Wednesday.

EU chief Ursula von der Leyen declared Tuesday that Europe was ready to negotiate with the United States and seek to improve ties with China as Beijing warned against damaging trade wars in the face of Donald Trump's protectionism.