The world's two biggest economies are on the brink of an economically destructive trade war. Here's what experts think could happen next.

China's stocks and currency came under pressure as markets returning from a week-long break were greeted by a new trade dispute with the United States and ructions in the global artificial intelligence sector.

After many months of threats, the US has imposed 10% tariffs on all Chinese goods coming into the country. Helen Qiao, chief economist for Greater China at Bank of America, joins John Lee and Katia Dmitrieva to gauge the impact in the world's second largest economy and what could lay ahead.

Beijing has made its decision. After days of warning of counter measures and urging Washington to enter negotiations and "meet China halfway", it has decided to hit back – or at least threaten to retaliate with its own tariffs.

As China and the U.S. battle over tariffs, locked in a tussle that could result in a deal or a trade war between the world's two largest economies, staying away from China's stock market is becoming the default option for foreign investors.

But Mr Trump’s most incendiary claims are reserved for China. The Communist Party, he says, “has subsidised and otherwise incentivised” Chinese firms to “export fentanyl and related precursor chemicals that are used to produce synthetic opioids sold illicitly in the United States”.

China’s tariff increases and other countermeasures were mostly symbolic and apparently designed to project strength while leaving the door open to talks.

The first punches have been thrown between the United States and China in what could amount to a short-lived trade dispute with limited economic fallout or the start of yet another lengthy and painful trade war reminiscent of President Donald Trump’s first term.