Chancellor George Osborne has set out an aim of making China the UK’s second largest trading partner by 2025, as he makes a controversial visit to a remote Chinese region.
Mr Osborne said Britain must “raise its game” to increase exports to China from £25bn (246bn yuan) to £30bn annually.
He is the first UK minister to visit Xinjiang province, in north-west China.
Campaigners have urged him to raise concerns about the treatment of the province’s Muslim Uighur minority.
Amnesty International said Uighurs had been subjected to “heavy-handed” security measures since an outbreak of unrest in 2009.