违反证监会规定，海南证监局对华夏银行、海南银行、绿创基金采取措施

Group 1: Regulatory Actions Against Banks - Hainan Securities Regulatory Bureau issued a warning letter to Huaxia Bank's Haikou branch for violations including unqualified personnel in fund sales and inadequate investor suitability checks [1] - Hainan Bank was ordered to rectify issues such as failure to timely apply for license changes and lack of qualified personnel in fund sales departments [2][3] Group 2: Regulatory Actions Against Fund Management Companies - Green Innovation Fund Management (Hainan) Co., Ltd. received a warning letter for failing to report significant matters and misusing private fund assets [4]