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The People's Bank of China set the midpoint at 6.1470 per dollar, up 0.02 percent from the previous fix.
Spot yuan changed hands at 6.1399 near midday, up 0.01 percent from Monday's close at 6.1404.
Activity in China's manufacturing sector unexpectedly picked up in September even as factory employment slumped to a 5-1/2-year low, a survey showed, but it had no impact on the spot market.
The HSBC/Markit Flash China Purchasing Managers' Index (PMI) rose to 50.5 in September from August's final reading of 50.2. The onshore spot yuan market at a glance: