Sou Hu Cai Jing·2025-05-20 06:31Group 1 - The A-share market saw a collective rise in the three major indices, with the Shanghai Composite Index increasing by 0.38%, driven by gains in sectors such as leisure goods, office supplies, and daily chemicals, while ports and shipping sectors faced declines [1] - The chip technology stocks showed strong fluctuations, with the chip ETF (159995) rising by 0.41%, and notable increases in component stocks such as WenTai Technology (up 3.35%), Weir Shares (up 2.48%), and Zhaosheng Micro (up 1.68%) [1] Group 2 - The U.S. Department of Commerce officially announced the repeal of the Biden administration's AI diffusion rules and introduced three additional policy measures to strengthen global semiconductor export controls, specifically targeting Huawei's Ascend chips [3] - Xiangcai Securities emphasized the critical importance of independent AI chip development for the supply chain security of AI technology, highlighting the growing significance of domestic AI chip companies following NVIDIA's reduction of specifications for customized AI chips in China [3] - The chip ETF (159995) tracks the National Chip Index, comprising 30 leading companies in the A-share chip industry, including SMIC, Cambricon, Changdian Technology, and Northern Huachuang [3]