Group 1 - The event is a desert flag football tournament held in Zhongwei City, Ningxia, attracting many enthusiasts and showcasing a unique version of American football that emphasizes skill over physical contact [1] - The tournament was organized by several sports authorities, highlighting the growing interest and participation in flag football in China, especially among younger players [1] - The format of the game was adjusted from 5-on-5 to 4-on-4 to better suit the desert environment, which tests players' physical endurance and adaptability [1] Group 2 - Zhongwei City has been actively developing high-quality outdoor sports destinations, with around 30 sports projects including desert volleyball, desert frisbee, and desert flag football, creating a comprehensive event system [2]