HONG KONG (AP) — China’s factory activity expanded in March, ending two months of contraction, the government said Tuesday, but analysts say prolonged impacts of the Iran war could weigh on growth. The official manufacturing purchasing managers index rose to 50.4 from 49 in February, the National Bureau of Statistics reported, beating economists’ expectations and notching the strongest reading in a year. PMI is measured on a scale of 0 to 100 and a reading above 50 indicates expansion. While