China’s government has told the country’s top oil refiners to suspend exports of diesel and gasoline as an escalating conflict in the Persian Gulf disrupts the arrival of crude from one of the world’s largest producing regions. While the country is only the third-largest supplier of oil products into the region — its vast refining sector primarily serves domestic demand — China’s curbs just six days into a war reflect a scramble across Asia to prioritize domestic needs as the crisis in the Middle East dee ...