A six-year-old girl has broken the women's world record for solving the 3x3x3 Rubik's Cube. Lian Yunzhi, from southwest China's Sichuan province, broke the record twice in three days, first with an average of 4.52 seconds and then 4.27 seconds. She is the only female cuber in the world to have an average time under 4.5 seconds. Lian has mastered more than 1,300 Rubik's Cube solving algorithms, spending about two to three hours a day on algorithm training over the past year. Her parents took her to Shanghai to train with professional coaches.