China is reporting that factory activity expanded in March, reversing two straight months of contraction. However, analysts say the prolonged impacts from the Iran war could weigh on growth prospects. The National Bureau of Statistics said Tuesday that the manufacturing purchasing managers index rose to 50.4 from 49 in February, its highest level in a year. A years-long property sector slump in China has weighed on economic growth and weakened domestic consumption and investment demand in China, the world’s second-largest economy after the U.S. It has been reliant on growth in exports to help drive its economy, which analysts say could now be prone to rising global energy costs caused by the Iran war.