China's manufacturing activity expanded at a faster pace in March, an official factory survey showed on Monday, suggesting some signs of stabilisation in the world's second-largest economy even as trade uncertainties mount.

The official purchasing managers' index (PMI) rose to 50.5 in March versus 50.2 in February, above the 50-mark separating growth from contraction, and matching a median forecast of 50.5 in a Reuters poll.