China's non-manufacturing sector saw its purchasing managers' index (PMI) return to expansionary territory in December, reflecting improved optimism among service providers and construction firms, official data showed.

The non-manufacturing PMI came in at 50.2 in December, up 0.7 percentage points from the previous month, according to the National Bureau of Statistics (NBS). A reading above 50 indicates expansion, while a reading below 50 reflects contraction. (Xinhua)