2002–2009 Liu has played internationally for China since 2002, when she was an alternate on the team at the when she had only been curling for two years. In 2004, she was a full member of the team. She played third for the team at the , and then second at the
2005 World Women's Curling Championship, her first experience at World's. The team finished 7th. The following season, Liu was playing lead for the team for the , and then she played third once again at the
2006 Ford World Women's Curling Championship, where the team finished 5th. For the 2006–07 season, Liu threw last rocks for the team while Wang held the broom as skip. The season included their first
Pacific Championship, an
Asian Winter Games bronze medal and a disappointing 7th-place finish at the
2007 World Women's Curling Championship. She was promoted to the third position for the
2008 Ford World Women's Curling Championship in which she earned a silver medal- China's first medal at a World Championship. Since then, Liu has played third for the team. She won her third Pacific Championship in 2008, which was followed by a gold medal at the
2009 Winter Universiade and, most importantly, by a World Championship gold medal at the
2009 World Women's Championship.
2010–2014 Liu Yin competed for
Team China at the
2010 Winter Olympics in
Vancouver,
British Columbia. Her team qualified for the playoffs, but in the Semifinal match they lost to eventual Gold medalists
Team Sweden. In the Bronze medal match they faced
Team Switzerland skipped by
Torino Silver medalist
Mirjam Ott. They Chinese pulled off a 12 -6 victory and became the first curling team from an Asian nation to win an Olympic medal. Just a month after the Olympics, Liu and Team China competed at the
2010 World Championship in
Swift Current, Saskatchewan, where they finished a disappointing 7th out of 12 teams. Later in 2010 Liu returned to the
Pacific Curling Championship, losing to Korea in the final to earn a silver medal for the third time. Liu played in the
2011 World Championship, where Team China defeated Team Denmark for the bronze medal. After World's she took some time away from curling, missing the Pacific Championships in 2011 and the World Championships in 2012. Liu returned to international competition in 2012 at the
Pacific Championships, where her team won the gold medal for a fifth time. At the
2013 World Championship Liu and Team China struggled, finishing 9th with a record of 4–7. In the fall, Team China settled for silver at the
2013 Pacific Championships. Playing Korea in the finals, China was up 8-6 only to give up 3 points in the 10th
end. China failed to automatically qualify for the
2014 Winter Olympics and so had to compete in the
qualification event to try to earn one of the last two spots. Liu's team won the event, defeating Japan in the final 7–6. At the Olympic games in
Sochi Liu failed to make the playoffs, finishing with a record of 4–5. == Personal life ==