Yu held the former world record for Rubik's Cube average (11.28 seconds) and single (8.72 seconds). He beat the previous world record holder Edouard Chambon, who had a single solve record of 9.18 seconds. Both records were set on May 5, 2008, at the Kashiwa Open 2008. He set the World Record for the 5x5x5 cube at 54.86 seconds in April. On May 23, 2008 Yu posted a video on YouTube where he completed the cube in 6.57 seconds. He also solved the Rubik's magic in 1.05 seconds.