Workers on an assembly line of an automaker in Dingzhou, Hebei Province, in this file photo. The official manufacturing Purchasing Managers’ Index (PMI) is seen slipping to 51.3 in May from 51.4 in April, according to a recent poll. That would mark the 22nd straight month of expansion for China’s manufacturing sector, and reinforce consensus views that the economy will slow only modestly this year. The official PMI survey is due out tomorrow, along with a similar official survey on services.SD-Agencies