U.S. Treasury Secretary Scott Bessent said on Wednesday that high tariffs between the United States and China are not sustainable, as President Donald Trump's administration signaled openness to de-escalating a trade war between the world's two largest economies that has raised fears of recession.

President Donald Trump had expressed optimism about a future deal with China and said tariffs would eventually come down.

China has sent back planes it ordered from the US in its latest retaliation over Trump tariffs, the boss of aircraft maker Boeing has said. Kelly Ortberg said two planes had already been returned and another would follow after trade tensions between the two countries escalated.

Comac's C919 is keeping Airbus and Boeing on their toes. A US-Europe trade war would open a lane for China, but the C919 relies on lots of US parts.