China’s exports and imports increased at a quicker rate in May than in the previous month, data from the country’s customs authority showed Thursday, as strong foreign demand stoked vigorous activity at domestic factories. Exports rose 8.7% last month from a year ago to $191.0 billion, according to figures published by the General Administration of Customs. That was up from a gain of 8.0% in April and it beat a median forecast of a 7.6% growth in a Caixin poll of 10 economists. Imports jumped 14.8% year-on-year in May to $150.2 billion, customs data showed. That was higher than April’s rise of 11.9% and well ahead of a median estimate of an increase of 9.5% in the survey. China held $40.8 billion in a trade surplus last month, compared with $44.8 billion in the same month in 2016.