A股海南板块盘初走低，海峡股份跌超5%，海南瑞泽跌超4%，海德股份、凯撒旅业、海汽集团跟跌。

Group 1 - The Hainan sector in the A-share market opened lower, with significant declines in several companies [1] - Haixia Co. experienced a drop of over 5%, while Hainan Ruize fell by more than 4% [1] - Other companies such as Haide Co., Caesar Travel, and Hainan Qiche Group also saw declines [1]