A股开盘，上证指数开跌0.02%，深证成指开涨0.26%，创业板指开涨0.4%；脑机接口、光刻机板块涨幅居前。

Core Viewpoint - The A-share market opened with mixed performance, with the Shanghai Composite Index slightly down while the Shenzhen Component and ChiNext Index showed positive gains, indicating sector-specific movements in the market [1] Group 1: Market Performance - The Shanghai Composite Index opened down by 0.02% [1] - The Shenzhen Component opened up by 0.26% [1] - The ChiNext Index opened up by 0.4% [1] Group 2: Sector Performance - The brain-computer interface sector showed significant gains, leading the market [1] - The photolithography machine sector also experienced notable increases, contributing to the overall positive sentiment in specific industries [1]