Trade is one of the biggest flashpoints between Washington and Beijing, apart from artificial intelligence, Trump's war with Iran, and China's designs on Taiwan. Expectations of any breakthroughs are low. Key points and original sources are listed below.

• Trade is one of the biggest flashpoints between Washington and Beijing, apart from artificial intelligence, Trump's war with Iran, and China's designs on Taiwan.S1

• Expectations of any breakthroughs are low. Analysts say the main aim of the pageantry is to maintain a fragile calm between the superpower rivalsS2