突然，集体猛拉！狂掀涨停潮

Market Overview - A-shares opened lower but showed an upward trend, with major indices fluctuating. The Shanghai Composite Index reported 3857.79 points, down 0.11%, while the Shenzhen Component Index rose by 0.11% and the ChiNext Index increased by 0.23% [2][3]. Sector Performance - The photolithography machine concept sector experienced a strong rally, with the index rising over 5%. Notable stocks included Wave Optoelectronics, Yongxin Optical, and Fuzhijing Technology, all hitting the daily limit [6][7]. - Other leading sectors included automotive parts, home appliances, and diversified finance, while precious metals and real estate sectors showed significant pullbacks [4][5]. Key Stocks - Wave Optoelectronics surged by 20.01%, with a market cap of 10.2 billion, and has increased by 64.45% year-to-date. Other notable performers included Sanhuan Group, which rose by 11.44%, and Zhongshi Technology, which increased by 10.18% [10][9]. - The humanoid robot sector also saw gains, with the index up 1.7%. Key stocks included Zhongchen Technology and Aopu Optoelectronics, both hitting the daily limit [17][18]. Company News - Semiconductor manufacturer SMIC's A-shares rose over 10%, while its Hong Kong shares increased by more than 6%. Reports indicated that SMIC is testing a deep ultraviolet lithography machine developed by a Shanghai startup, which could potentially enhance its production capabilities [11][12][15]. - The demand for NVIDIA's new AI chip RTX6000D in the Chinese market has been weak, with some major tech companies opting not to place orders due to its high pricing and perceived low cost-performance ratio [15][16]. Central Enterprises - Since the start of the 14th Five-Year Plan, the total assets of central enterprises have exceeded 90 trillion yuan, indicating a significant enhancement in their overall strength [21][22][23].