Trump wants to preserve relations with Xi, but Iranian customs data show Chinese entities have made thousands of shipments of components used in drones and missiles This summer, when the U.S. and Iran signed a temporary truce, China touted its role in easing tensions in the Middle East. It said its foreign ministry made dozens of calls to nudge peace along, and that President Xi Jinping himself had intervened with suggestions to end the fighting.That same day, a plane from China landed in Tehran. It carried a shipment for Iran’s Ministry of Defense that included electronics components that can be...