北京：寒冷“三九天” 什刹海文旅热

Group 1 - The article highlights the enthusiasm of citizens and tourists in Beijing's Shichahai area, despite the cold weather, as they engage in leisure activities and sightseeing [2][4][9] - A winter swimmer, wearing a "Spider-Man" swim cap, attracts attention from onlookers as they dive into the water, showcasing the popularity of winter swimming [2][4] - Visitors are seen taking photos and enjoying the scenic views around Shichahai, indicating a vibrant atmosphere in the area [9][15] Group 2 - Staff at the Shichahai ice rink are preparing for its opening by measuring the thickness of the ice, suggesting that winter sports activities are being organized [13] - The presence of families and children enjoying the environment, such as a child posing for a photo, reflects the area's appeal as a recreational destination [15][17]