Kunshan, Jiangsu. A group of Chinese teenagers has demonstrated astonishing skill in building and flying paper airplanes, breaking a world record that had stood unbroken for 15 years. These young individuals surpassed the record of 'longest time aloft' of 29.2 seconds, set by Japanese citizen Takuo Toda in 2010, multiple times in a single day.During a test held at the Kunshan Sports Center in Jiangsu Province, 16-year-old Rao Chongyi achieved 31.15 seconds and Liu Liwen achieved 31.25 seconds, setting a new history for keeping the aircraft airborne.What makes this achievement even more special is that this same group had just...