The purchasing managers' index (PMI) for China's non-manufacturing sector came in at 58.2 in March, up from 56.3 in February, the National Bureau of Statistics said Friday.A reading above 50 indicates expansion, while a reading below it reflects contraction.The purchasing managers' index (PMI) for China's non-manufacturing sector came in at 58.2 in March, up from 56.3 in February, the National Bureau of Statistics said Friday.A reading above 50 indicates expansion, while a reading below it reflects contraction.