A股开盘，上证指数开跌0.04%，深证成指开跌0.02%，创业板指开跌0.15%；乳业、通信服务板块跌幅居前。

Core Viewpoint - The A-share market opened with slight declines across major indices, indicating a cautious sentiment among investors [1] Market Performance - The Shanghai Composite Index opened down by 0.04% - The Shenzhen Component Index opened down by 0.02% - The ChiNext Index opened down by 0.15% [1] Sector Performance - The dairy industry and communication services sectors experienced the largest declines [1]