Rivals is a BBC News season about the contest for supremacy between the US and China.
The US-China over artificial intelligence is heating up, but some warn the US could be over-reacting.
The US-China rivalry is about more than trade - it spans economics, defence, culture and technology.
The world's second largest economy is battling a trade war with the US and slowing domestic demand.
Tariffs on $156bn of Chinese goods will be imposed if a trade deal is not finalised by December, Steve Mnuchin says.