海南自贸概念强势延续 海南发展等多股涨停

Group 1 - The core viewpoint of the article highlights the strong continuation of the Hainan Free Trade Zone concept, with multiple stocks such as Hainan Development, Hainan Airlines Group, and others reaching their daily price limits [1] - Since the official launch of the Hainan Free Trade Port's full island closure operation on December 18, the duty-free sales in Sanya have exceeded 100 million yuan for four consecutive days, with sales figures of 118 million, 105 million, 108 million, and 102 million yuan respectively [1] - On December 19, the cumulative sales for the year in Sanya surpassed 20 billion yuan [1]