The Shanghai Composite fell 1.2% to below 3,770 while the Shenzhen Component slid 2.2% to 12,200 on Thursday, marking a third straight decline as artificial intelligence and semiconductor shares came under heavy selling pressure. Those sectors had fueled the rally that lifted the Shanghai index to a decade high, but profit-taking and renewed concerns over weak fundamentals triggered a pullback. Sentiment was further dampened by geopolitical and trade risks as US President Donald Trump pushed to maintain tariffs and escalated his rhetoric toward China. Notable losers included Zhongji Innolight (-10.4%), Eoptolink Technology (-13.2%), Cambricon Technologies (-11.5%), Victory Giant (-6%) and Foxconn Industrial (-4.4%).