Chinese companies are accelerating a purge of foreign components from their supply chains, as trade tensions with the US threaten to hasten the decoupling between the world’s two largest economies.

In the weeks since President Donald Trump hit China with steep tariffs, more than two dozen companies listed in Shanghai and Shenzhen have told investors that they were increasing efforts to source domestic inputs to replace foreign products or expected to benefit as their peers localised purchasing.

The financial filings, reviewed by the Financial Times, were issued by companies spanning the semiconductor, chemicals and medical devices sectors. They demonstrate the potential lasting impact of Trump’s trade war by effecting a permanent reordering of supply chains.