HONG KONG China 's manufacturing activity grew in March for the second month in a row, official data showed on March 31, as the world's second-largest economy fights to climb out of a prolonged slump. Authorities have looked in recent months to revive confidence in the Chinese economy, grappling with a prolonged property sector crisis and now under increasing pressure from fresh trade tensions with the United States. The Purchasing Managers' Index came in at 50.5 in March, according to the