海南自贸区板块短线拉升，海南发展涨停

Core Viewpoint - The Hainan Free Trade Zone sector experienced a short-term surge on December 31, with Hainan Development hitting the daily limit, and other companies such as Haikou Gas Group, Hainan Airport, Hainan Huatie, Caesar Travel, and Hainan Mining also seeing gains [1]. Company and Industry Summary - Hainan Development reached its daily limit increase [1] - Haikou Gas Group, Hainan Airport, Hainan Huatie, Caesar Travel, and Hainan Mining followed with notable increases [1]