重要军事演习，在此期间任何船舶禁止驶入！

Group 1 - The article discusses a significant military exercise conducted by China Maritime Safety Administration, which includes live-fire drills in specified maritime areas [2] - The exercise is scheduled for December 30, from 08:00 to 18:00, during which all vessels are prohibited from entering the designated zones [2] - The article lists multiple geographic coordinates outlining the restricted areas for the military exercise, indicating a comprehensive operational scope [2]