Chinese residents wear masks for protection as smoke billows from a coal fired power plant in Shanxi, China.

Manufacturing activity improved in China in March, separate surveys showed Friday, helping ease concerns over the health of the world's second-largest economy.

China's official manufacturing Purchasing Managers' Index (PMI) came in at 50.2 for March, above a forecast of 49.3 from a Reuters poll, returning to growth for the first time since July. That compares with 49.0 in February, which was the lowest reading since 2011.