China's stock markets took a nosedive on Friday, ending a powerful rally with the CSI300 Index dropping 2%—its steepest fall in nearly five weeks. The Shanghai Composite lost 0.9%, briefly touching its highest level since 2015, while Hong Kong's Hang Seng Index slid 1.7%, marking a five-day losing streak, the longest since March. But here's where it gets controversial: the pullback signals renewed investor caution amid escalating Sino-U.S. tensions. Beijing's expanded rare earth export controls and tighter checks on Nvidia's AI chip imports have reignited fears of a tech and trade confrontation. With both Washington and Beijing signaling harder positions ahead of a possible Trump-Xi summit, traders are cashing in profits after months of strong gains. And this is the part most people miss: the brunt of the sell-off was felt in tech, AI, and EV-related stocks. The CSI Semiconductor Index slumped 5%, the AI sector fell 4.8%, and EV shares dropped 6% after regulators revised tax-exemption rules. Rare earth shares also sank 2.9%, while battery makers CATL and CALB tumbled 6.8% and 9.7%, respectively. Analysts suggest that both powers may be 'strengthening their leverage' ahead of upcoming trade talks. China's markets are shifting from 'a liquidity-driven rally to a profit-taking phase,' with gains likely to stall in sideways consolidation. What's next? All eyes are on Monday's trade data, which could offer crucial clues about China's export resilience amid tightening U.S. tech restrictions. A stronger reading may calm market nerves and revive risk appetite, while any signs of weakness could deepen the pullback and raise pressure for fresh stimulus from Beijing. With Washington and Beijing inching toward a potential high-stakes Trump-Xi meeting, traders expect further policy signaling in the weeks ahead, particularly on technology, trade, and currency stability. Until then, volatility is likely to remain elevated, with investors treading carefully between geopolitical crossfire and fragile market optimism. Controversy alert: Is this a temporary blip or a sign of a broader market downturn? What role will the upcoming Trump-Xi summit play in shaping global markets? Join the discussion below!