Liu began competing in the event as a teenager and in 2003 she threw a best of 58.03 metres. Representing
Hunan Province, she was seventh at the
2005 National Games of China. Liu came sixth at the Chinese World Trials in 2007. Although the following year's Chinese championships were held after the
2008 Beijing Olympics, she established herself at a national level by taking the Chinese javelin title in a personal best 59.04 m, finally improving upon her best mark she had set as a sixteen-year-old. Liu missed the
2009 World Championships in Athletics, but she had a rapid ascent at the regional level that year. She won the national title for a second time and improved her best to 59.55 m on the Chinese Grand Prix circuit. In October she won the javelin at the
2009 National Games of China with another best of 60.65 m. The
2009 Asian Athletics Championships held the next month in
Guangzhou brought her another
gold medal as she and
Li Lingwei took the top two spots for the host nation. Liu threw beyond the 60-metre mark again at December's
2009 East Asian Games to win her third gold on home soil in 2009, while it was
Zhang Li who completed the Chinese 1–2 medal sweep on that occasion. Following a low-key 2010, when she was sixth nationally and had a year's best of 58.49 m, ==International competitions==