US President Donald Trump has been very eager to show off to Chinese leader Xi Jinping his new US$5 million White House helipad, his latest bid to stamp his image on Washington.While Xi might act impressed and compliment the US president on his latest building project – part of Trump’s bid to match Xi’s splendour-filled hosting four months ago in Beijing and show the Chinese that Americans can build infrastructure too – do not count on Xi actually trying it out with a chopper ride this week...