A股早评：三大指数小幅低开，深圳国企改革板块大涨

Market Overview - The A-share market opened with three major indices slightly lower, with the Shanghai Composite Index down 0.25%, the Shenzhen Component Index down 0.29%, and the ChiNext Index down 0.28% [1] Shenzhen State-Owned Enterprise Reform - The Shenzhen state-owned enterprise reform sector experienced significant gains, with Jian Ke Yuan hitting the daily limit up of 20%, and several stocks including Shen Saige and Shen Fangzhi A reaching the limit up of 10% [1] - The Shenzhen Municipal Financial Management Bureau and other departments issued the "Shenzhen Action Plan for Promoting High-Quality Development of Mergers and Acquisitions (2025-2027)", aiming for the total market value of domestic and foreign listed companies to exceed 20 trillion yuan by the end of 2027 [1] Quantum Technology Sector - Quantum technology concept stocks opened high, with Tengjing Technology rising over 10% and Jida Zhengyuan increasing over 8%, following Google's publication of a breakthrough in quantum algorithms in the journal Nature [1] Engineering Machinery Sector - The engineering machinery sector saw a pullback, with Iron Tuo Machinery dropping 10% and Zhigao Machinery declining over 5% [1]