Teenage basketball players from high schools across the country fought hard on a court (球场) in Shanghai on Sept 20. They took part in a 3×3 basketball game. In this game, there are just 3 players on each team. The game came from American streetball and has become popular in China. Compared with professional (专业的) basketball games, 3×3 allows players to show more of their individual (个人的) skills.