Chinese chip stocks tumble after U.S. calls for new curbs on high-end tech  CNBC China Says Biden's New Chip Curbs Will Harm Recovery  Bloomberg Markets and Finance China tech shares sink as U.S. export curbs raise chip sector hurdles  Reuters Silence of US business community is by no means a boon to Washington: Global Times editorial  Global Times US launches most savage attack on free trade: Global Times editorial  Global Times View Full Coverage on Google News