China’s exports to the United States tumbled in April while its trade with other economies surged, suggesting that President Donald Trump's tariffs offensive is hastening a shakeup in global supply chains. Total exports from China rose 8.1% last month from a year earlier, much faster than the 2% pace most economists had been expecting. Shipments to the U.S. sank 21% in dollar terms as Trump’s tariffs on most Chinese exports rose to as high as 145%. With Chinese tariffs on U.S. goods at 125%, business between the two biggest economies has grown increasingly uncertain.