【明報專訊】AT THE G20 SUMMIT in Hangzhou last week, all eyes were on the talk between Xi Jinping, the Chinese President and US President Barack Obama, during which they discussed a wide array of topics ranging from the South China Sea, North Korea's nuclear test, measures against terrorism to the two countries' differences on the control of their military forces. What observers had not expected was that, during the meeting, Xi stressed China's "determination to stop Taiwan's independence or separatism in any shape or form" and expressed hope that "the US will stick to its one-China policy and the principles laid out in the Three Communiqués", adding that the US had to put all that into practice in order to "preserve the framework of cooperation between China and the US". Barack Obama, in response, said that the US's one-China policy remains unchanged and that the US "does not support any attempts to seek Taiwan's independence". The conversation has the effect of China isolating the US from Taiwan independence. It also shows that the Beijing authorities' confrontation with Tsai Ing-wen is spilling over to the international arena.