Russian President Vladimir Putin’s visit to China last week saw the signing of some 40 documents and a joint statement on strengthening the Beijing-Moscow partnership. The visit, just days after US President Donald Trump’s Beijing trip, is more than a diplomatic coincidence. It is a vivid reminder that the global order is now being shaped less by alliances than by a fluid triangle of China, the United States and Russia, with Beijing increasingly sitting at the centre. Timing is diplomacy. When...