Donald Trump's whirlwind tour of Asia this week culminated in a much-anticipated sit-down with Chinese President Xi Jinping on the sidelines of the annual Asia-Pacific Economic Cooperation (APEC) summit hosted this year by South Korea.

So far, details of the meeting have yielded no big surprises. The US will lower tariffs in exchange for China cracking down on chemicals used to make fentanyl. Trump said China would buy "tremendous amounts" of soybeans from the US, after Beijing had cut off purchases amid an escalating trade war.