* Liu improves 50m backstroke world record
* First record to fall in Asian Games pool since 2002
* Former world champion Fu takes silver (Adds detail, quotes)
By Nick Mulvenney
JAKARTA, Aug 21 (Reuters) - China's Liu Xiang surprised even herself when she swam a world record time to win the women's 50 metres backstroke at the Asian Games on Tuesday, storming home in 26.98 seconds to claim her first major title.
The 21-year-old's time bettered the 27.06 seconds which her compatriot Zhao Jing swam in a bodysuit at the Rome world championships in 2009.
It was the first world record to fall in the Asian Games pool since Japan's Kosuke Kitajima improved the 200m breaststroke mark in Busan in 2002.
"I didn't see the result I only heard the words 'world record', I couldn't believe it!," Liu told reporters at the Jakarta pool.
"It was like a dream. I did not expect to do that! It's not even my favourite event."
Immediately dubbed 'The Mermaid' by the media back home, Liu was not going to let the fact that the event is not contested at the Olympic Games take the gloss off her achievement.
"I am just happy that I made a breakthrough," she said.
"I don't care whether it's an Olympic event or not, all I care about is doing the best for myself."
Liu, who won a bronze in the event at the 2015 world championships in Kazan, credited her recent training regime for her improvement.
"I improved my legwork over the last few months when we were training in the United States, and I think that made me better," she said.
Former world champion and defending Asian Games champion Fu Yuanhui, who is on the comeback trail after a shoulder injury, finished second in 27.68 with Japan's Natsumi Sakai claiming bronze in 27.91.
Fu, who became a social media sensation at the 2016 Rio Olympics due to her quirky personality, said she was delighted for her team mate.
"It's a great thing that Liu kept the world record in Chinese hands," said the Olympic 100m backstroke bronze medallist.
"My own performance was pretty much what I expected, I'm about 70 percent at the moment."
Liu will race again in the 50m freestyle on Thursday and hopes to have more to celebrate then.
"Today I will not celebrate," she said. "Maybe I will celebrate after I win a gold medal from 50m freestyle?" (Additional reporting by Jessica Damiana and Angie Teo, editing by Ed Osmond and Christian Radnedge)