Liu was born to a Chinese father and a Hungarian mother in Budapest on 13 March 1998.[3][4] He started the sport in 2006 and trained in China for a year.[5] He studied Sports Manager at the University of Debrecen.[6]
at the 2022 Winter Olympics held in Beijing, he became the most successful winter Olympian in 2022 after winning two bronze medals and one gold at the Beijing Olympics in 2022.[9][10] He won a gold in 500 m, having led from start to finish.[11] This win was the first ever individual gold medal at the Winter Olympics for Hungary.[12] He won an individual bronze in the 1,000 m, and as part of the team in the 2,000m mixed relay.[13]
In November 2022, Liu and his brother requested consent from the Hungarian National Skating Federation to allow them to change nationality, a request which was granted in December, but they would need to sit out competing for 12 months when the nationality is changed.[14][15]