Activity in China's factory sector slipped to an 11-month low in March as new orders crumbled, a private survey showed. HSBC's flash China manufacturing index dipped to 49.2, from 50.7 in February, while the new orders sub-index fell for the second straight month to 49.3. The poor readings will likely fuel calls for more stimulus measures as persistent weakness plagues the world's second-largest economy despite two recent rate cuts and other easing.