Leaders of the Group of 20 major economies began arriving on Monday at Rio de Janeiro’s Modern Art Museum for their annual summit, bracing for a shift in the global order with the return to power of US president-elect Donald Trump.Discussions of trade, climate change and international security will run up against sharp US policy changes that Trump vows upon taking office in January, from tariffs to the promise of a negotiated solution to the war in Ukraine.While US President Joe Biden arrives as a lame duck with just two months remaining in the White House, China’s President Xi Jinping will be a central player at a G20 summit riven with geopolitical tensions amid the wars in Gaza and Ukraine.For all the latest headlines follow our Google News channel online or via the app.“It’s not only geopolitics that is causing us concern, but also that China’s role, its economic and financial role, is very prominent in many issues,” said a German official, who requested anonymity to discuss the