US President Donald Trump hinted at a "not-too-distant" visit to China after an invitation from Xi Jinping, signalling possible diplomacy amid trade tensions, and geopolitical strains.

Beijing also seems willing to engage in diplomatic channels. China's US embassy confirmed last week that it is inviting foreign dignitaries — some of them American — to a September 3 ceremony in Beijing commemorating the 80th anniversary of the conclusion of World War II.