Global Market: China stocks mixed, Hong Kong shares edge higher as AI weakness weighs

China's mainland stocks traded mixed on Monday as AI and semiconductor shares fell, dragging the CSI AI Index down 1.2% and the STAR50 down 0.9%, even as banking stocks rose due to defensive buying. Hong Kong's Hang Seng gained 0.4%, but its AI sub-index dropped 2.4%, led by a 10.5% plunge in Z.AI after a discounted share placement.