This video can not be played

A young girl has broken the women's world record for the 3x3x3 Rubik's Cube twice in three days at the World Cube Association.

At age six, Lian Yunzhi has become the only female cuber in the world to have an average time under 4.5 seconds. She first broke the record with an average of 4.52 seconds and then 4.27 seconds at competitions in Wuhan and Guangzhou, China.

The young competitor from Sichuan Province has mastered more than 1,300 Rubik's Cube solving algorithms after vigorous training that involved spending two to three hours a day on the cube over the past year.

Watch: Six-year-old girl from China sets new Rubik's Cube world record. Video, 00:00:29Watch: Six-year-old girl from China sets new Rubik's Cube world record

Up Next. UK's speedcubing record holder shows how it's done. Video, 00:00:37UK's speedcubing record holder shows how it's done

Teen sets record for solving 12-sided Rubik's cube. Video, 00:00:44Teen sets record for solving 12-sided Rubik's cube

Teenager making world flags out of Rubik's Cubes. Video, 00:01:18Teenager making world flags out of Rubik's Cubes

Watch: Timelapse shows typhoon barrelling towards Japan. Video, 00:00:48Watch: Timelapse shows typhoon barrelling towards Japan

Inside Djibouti refugee camp for thousands fleeing Houthi advance in Yemen. Video, 00:00:45Inside Djibouti refugee camp for thousands fleeing Houthi advance in Yemen

'No surprises' as results emerge in Russian parliamentary election. Video, 00:01:22'No surprises' as results emerge in Russian parliamentary election

'Other generations just buried it' - Youths share their mental health concerns. Video, 00:02:03'Other generations just buried it' - Youths share their mental health concerns

Watch: Dramatic moment a cargo ship crashes into another vessel. Video, 00:00:53Watch: Dramatic moment a cargo ship crashes into another vessel

Earl Spencer says he felt Charles had 'giddy tone' during call after Diana's death. Video, 00:01:54Earl Spencer says he felt Charles had 'giddy tone' during call after Diana's death

Watch: Fans react as Ed Sheeran speaks out over Macklemore controversy at show. Video, 00:01:13Watch: Fans react as Ed Sheeran speaks out over Macklemore controversy at show

Watch: BBC tracks down abusive teacher secretly released early. Video, 00:01:32Watch: BBC tracks down abusive teacher secretly released early

Earl Spencer's claims about King's reaction to Diana's death open old wounds. Video, 00:01:04Earl Spencer's claims about King's reaction to Diana's death open old wounds

'Enough is enough': Women protest after string of murders near Johannesburg. Video, 00:01:28'Enough is enough': Women protest after string of murders near Johannesburg

Watch: Trump says ban on some news outlets is 'because they're fake news' Video, 00:00:54Watch: Trump says ban on some news outlets is 'because they're fake news'