China says its exports to the US fell nearly 10% in May, as trade talks are due to start in London

China's exports to the United States sank fell nearly 10% in May from a year earlier, new customs data show, adding to pressure on the world's second largest economy as a new round of trade talks with Washington was due to start later Monday in London.

China's total exports rose 4.8% last month, slowing from an 8.1% year-on-year increase in April. Imports declined 3.4% year-on-year, leaving a trade surplus of $103.2 billion.