Group 1 - The event "Summer Winter Swimming Challenge" in JianDe attracted over 2,800 participants from 120 teams across 16 provinces, showcasing a spectacular scene of "thousands competing on the river" [3] - The competition featured traditional events such as the "Cold Resistance Warrior Crossing the Xin'an River" (900 meters) and "Cold Resistance Warrior Swimming in the Xin'an River" (1,700 meters), testing both teamwork and individual cold resistance limits [3] - The unique charm of the Xin'an River's summer winter swimming comes from the constant temperature water sourced from 70 meters deep at the Xin'an River Hydropower Station, with the event being held 24 times since its inception in 1988 [3] Group 2 - The newly added "Reverse Current Challenge" paddleboard competition became the highlight of the event, with 47 participants, the youngest being only 12 years old [4] - The event introduced the concept of "light extreme sports," promoting a diversification of traditional winter swimming, and JianDe is developing various light extreme sports such as triathlons, rock climbing, and diving, appealing to younger audiences [4] - JianDe aims to deepen the "sports + cultural tourism" model, integrating resources like constant temperature river water and scenic canyons to create a new trillion-level sports tourism industry [4]